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guava | Google core libraries for Java

 by   google Java Version: v31.1 License: Apache-2.0

 by   google Java Version: v31.1 License: Apache-2.0

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kandi X-RAY | guava Summary

guava is a Java library. guava has no bugs, it has build file available, it has a Permissive License and it has high support. However guava has 1 vulnerabilities. You can download it from GitHub, Maven.
Google core libraries for Java
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • guava has a highly active ecosystem.
  • It has 44260 star(s) with 9887 fork(s). There are 2429 watchers for this library.
  • There were 1 major release(s) in the last 12 months.
  • There are 646 open issues and 2703 have been closed. On average issues are closed in 211 days. There are 101 open pull requests and 0 closed requests.
  • It has a positive sentiment in the developer community.
  • The latest version of guava is v31.1
guava Support
Best in #Java
Average in #Java
guava Support
Best in #Java
Average in #Java

quality kandi Quality

  • guava has 0 bugs and 0 code smells.
guava Quality
Best in #Java
Average in #Java
guava Quality
Best in #Java
Average in #Java

securitySecurity

  • guava has 1 vulnerability issues reported (0 critical, 0 high, 1 medium, 0 low).
  • guava code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
guava Security
Best in #Java
Average in #Java
guava Security
Best in #Java
Average in #Java

license License

  • guava is licensed under the Apache-2.0 License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
guava License
Best in #Java
Average in #Java
guava License
Best in #Java
Average in #Java

buildReuse

  • guava releases are available to install and integrate.
  • Deployable package is available in Maven.
  • Build file is available. You can build the component from source.
  • Installation instructions, examples and code snippets are available.
  • guava saves you 1095367 person hours of effort in developing the same functionality from scratch.
  • It has 511012 lines of code, 53150 functions and 3074 files.
  • It has medium code complexity. Code complexity directly impacts maintainability of the code.
guava Reuse
Best in #Java
Average in #Java
guava Reuse
Best in #Java
Average in #Java
Top functions reviewed by kandi - BETA

kandi has reviewed guava and discovered the below as its top functions. This is intended to give you an instant insight into guava implemented functionality, and help decide if they suit your requirements.

  • Builds a new instance from the given Hasher array .
  • Returns a set of possible combinations .
  • Populate a mapping between type variables .
  • Initializes this Future .
  • Get the value of the future .
  • Performs a new cell with a new cell .
  • Parse an IPV6 string into its numeric format .
  • Finds the last item in the stream .
  • Blocks until the thread is interrupted .
  • Returns a new Multiset containing the sum of the given multiset .

guava Key Features

Google core libraries for Java

Adding Guava to your build

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<dependency>
  <groupId>com.google.guava</groupId>
  <artifactId>guava</artifactId>
  <version>31.1-jre</version>
  <!-- or, for Android: -->
  <version>31.1-android</version>
</dependency>

Dart Flutter FAILURE: Build failed with an exception. Error

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storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=../key.jks

android datastore-preferences: Property delegate must have a 'getValue(Context, KProperty<*>)' method

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import java.util.prefs.Preferences
import androidx.datastore.preferences.core.Preferences
val Context.dataStore by preferencesDataStore(name = "settings")
-----------------------
import java.util.prefs.Preferences
import androidx.datastore.preferences.core.Preferences
val Context.dataStore by preferencesDataStore(name = "settings")
-----------------------
import java.util.prefs.Preferences
import androidx.datastore.preferences.core.Preferences
val Context.dataStore by preferencesDataStore(name = "settings")

android:exported needs to be explicitly specified for <activity>. Apps targeting Android 12 and higher are required to specify

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<receiver android:name="<name_of_the_entry>"
                android:exported="false or true"
                tools:node="merge" />
-----------------------
     <activity
                android:name="<activity which is giving error>"
                android:exported="true"
                tools:node="merge" />
-----------------------
<activity android:name="name_of_the_activity_inside_library>"
    android:exported="false|true"
    tools:node="merge" />
-----------------------
debugImplementation "androidx.fragment:fragment-testing:<version>"
androidTestImplementation "androidx.fragment:fragment-testing:<version>"
-----------------------
debugImplementation "androidx.fragment:fragment-testing:<version>"
androidTestImplementation "androidx.fragment:fragment-testing:<version>"
-----------------------
 android:exported="true"
-----------------------
androidTestImplementation "androidx.test.ext:junit:1.1.3"
androidTestImplementation "androidx.compose.ui:ui-test-junit4:1.0.4"
-----------------------
> java.util.concurrent.ExecutionException: com.android.builder.testing.api.DeviceException: com.android.ddmlib.InstallException: INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI: /data/app/xxxxx.tmp/base.apk (at Binary XML file line #129): YOUR.FULLY.QUALIFIED.NAME.FAILING.ACTIVITY: Targeting S+ (version 31 and above) requires that an explicit value for android:exported be defined when intent filters are present
-----------------------
<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$BootstrapActivity"
android:exported="true"
tools:node="merge"/>

<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$EmptyActivity"
android:exported="true"
tools:node="merge"/>

<activity android:name="androidx.test.core.app.InstrumentationActivityInvoker$EmptyFloatingActivity"
android:exported="true"
tools:node="merge"/>
-----------------------
 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">
   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />
testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'
-----------------------
 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">
   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />
testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'
-----------------------
 <activity
        android:name="com.test.activity.SplashActivity"
        android:clearTaskOnLaunch="true"
        android:label="@string/app_name"
        android:launchMode="singleTop"
        android:noHistory="true"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.NoActionBar"
        android:exported="true">
   <receiver
        android:name="com.test.receiver.ShareReceiver"
        android:exported="true">
        <intent-filter>
            <action android:name="com.test.fcm.android.action.broadcast" />
        </intent-filter>
    </receiver>

   <service
        android:name="com.google.android.gms.tagmanager.InstallReferrerService"
        android:exported="true" />
testImplementation 'junit:junit:4.13.2' 
androidTestImplementation 'androidx.test:runner:1.4.0'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
implementation 'com.razorpay:checkout:1.6.15'
-----------------------
"com.google.dagger:hilt-android:2.38.1"
"com.google.dagger:hilt-android-gradle-plugin:2.38.1"
"com.google.dagger:hilt-android-compiler:2.38.1"
"com.google.dagger:hilt-android-testing:2.38.1"
"com.google.dagger:hilt-android:2.40.5"
"com.google.dagger:hilt-android-gradle-plugin:2.40.5"
"com.google.dagger:hilt-android-compiler:2.40.5"
"com.google.dagger:hilt-android-testing:2.40.5" 
-----------------------
"com.google.dagger:hilt-android:2.38.1"
"com.google.dagger:hilt-android-gradle-plugin:2.38.1"
"com.google.dagger:hilt-android-compiler:2.38.1"
"com.google.dagger:hilt-android-testing:2.38.1"
"com.google.dagger:hilt-android:2.40.5"
"com.google.dagger:hilt-android-gradle-plugin:2.40.5"
"com.google.dagger:hilt-android-compiler:2.40.5"
"com.google.dagger:hilt-android-testing:2.40.5" 
-----------------------
<receiver
    android:name="com.razorpay.RzpTokenReceiver"
    android:exported="false">
    <intent-filter>
        <action android:name="rzp.device_token.share" />
    </intent-filter>
</receiver>

<activity
    android:name="com.razorpay.CheckoutActivity"
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
    android:exported="true"
    android:theme="@style/CheckoutTheme">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <data
            android:host="rzp.io"
            android:scheme="io.rzp" />
    </intent-filter>
</activity>
-----------------------
android:exported="true" <!-- or false as required -->
-----------------------
<activity
     android:name=".MainActivity"
     android:exported="true" <** add this line on AndroidManifest.xml**
     android:launchMode="singleTop"
     android:theme="@style/LaunchTheme"
 </activity>

Could not resolve com.google.guava:guava:30.1-jre - Gradle project sync failed. Basic functionality will not work properly - in kotlin project

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    repositories {
        mavenCentral()
        google()
    }

-----------------------
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        mavenCentral()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:7.1.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        mavenCentral()
        google()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

Cannot locate a Guava Jar in the gradle distribution?

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plugins {
   id("org.asciidoctor.jvm.pdf") version "3.2.0"
   id("org.asciidoctor.jvm.gems") version "3.2.0"
   id("org.asciidoctor.jvm.convert") version "3.2.0"
}

Unable to find out where reflections-maven plugin comes from

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<project ...>
 ...
 <build>
   <plugins>
     <artifactId>maven-help-plugin</artifactId>
     <version>3.2.0</version> <!-- or higher! -->
   </plugins>
 </build>
 ...
</project>
mvn -Dverbose=true -Doutput=./eff.pom.xml \
  org.apache.maven.plugins:maven-help-plugin:3.2.0:effective-pom
-----------------------
<project ...>
 ...
 <build>
   <plugins>
     <artifactId>maven-help-plugin</artifactId>
     <version>3.2.0</version> <!-- or higher! -->
   </plugins>
 </build>
 ...
</project>
mvn -Dverbose=true -Doutput=./eff.pom.xml \
  org.apache.maven.plugins:maven-help-plugin:3.2.0:effective-pom

Java method should cache the results

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<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}
-----------------------
<project>
    <!-- only defaults ..., and: -->
    <dependencies>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>31.0.1-jre</version>
        </dependency>
    </dependencies>
    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
    </properties>
</project>
package com.stackoverflow.cache.test;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;

public class Main {
  
  static final LoadingCache<String, LinkedHashMap<Character, Integer>> CACHE = CacheBuilder.newBuilder()
      .build( // with defaults, and this loader:
          new CacheLoader<String, LinkedHashMap<Character, Integer>>() {
        @Override
        public LinkedHashMap<Character, Integer> load(String key) {
          System.out.format("Key: \"%s\" not cached.%n", key);
          return analyze(key); // invoking "expensive calculation"! 
        }
      });

  public static void main(String[] args) throws ExecutionException {
    try ( Scanner consoleScanner = new Scanner(System.in)) {
      String word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      while (!"bye".equalsIgnoreCase(word)) {// from Yoda, greetings! https://blog.codinghorror.com/new-programming-jargon/#1 ;)
        System.out.println(CACHE.get(word));// invoke cache, instead of "expensive" calculation!
        word = consoleScanner.nextLine().trim(); // line wise! (for word-wise: next())
      }
      System.out.println("Bye!");
    }
  }

  // basically your charCounter method with single parameter + stream:
  static LinkedHashMap<Character, Integer> analyze(String arg) {
    LinkedHashMap<Character, Integer> elements = new LinkedHashMap();
    arg.chars().forEach((num) -> {
      Character c = (char) num;
      if (elements.containsKey(c)) {
        elements.put(c, elements.get(c) + 1);
      } else {
        elements.put(c, 1);
      }
    });
    return elements;
  }
}

>Java is the best programming language in the world!
Key: "Java is the best programming language in the world!" not cached.
{J=1, a=5, v=1,  =8, i=3, s=2, t=3, h=2, e=4, b=1, p=1, r=3, o=2, g=4, m=2, n=3, l=2, u=1, w=1, d=1, !=1}
>hello
Key: "hello" not cached.
{h=1, e=1, l=2, o=1}
>hello
{h=1, e=1, l=2, o=1}
>bye
Bye!
public static void main(String[] args) throws ExecutionException {
  for (String word : args) {
    System.out.println(CACHE.get(word)); // ...or custom "print" method
  }
}
// limited version:
static final int MAX_ENTRIES = 100;
static final Map<String, Map<Character, Integer>> CACHE = new LinkedHashMap<>(
  MAX_ENTRIES + 1, // initial capacity
  1.0f, // load factor: better 1. than 0.75 (in this setup!?)
  true // "accessOrder" flag
) {
    // eviction: "...This method is invoked by put and putAll after inserting a new entry into the map"
    public boolean removeEldestEntry(Map.Entry eldest) {
        return size() > MAX_ENTRIES;
    }
};
// no limit, no "order", no evict, no outdate:
static final Map<String, Map<Character, Integer>> CACHE = new HashMap<>();
 ... CACHE = Collections.synchronizedMap(new xxxMap...);
static Map<Character, Integer> load(String key) {
  final Map<Character, Integer> result; 
  if (CACHE.containsKey(key)) { // cached!
    result = CACHE.get(key);
    // to "refresh" key, put it again (LRU):
    // CACHE.put(key, result); // here or outside the if-else
  } else { // "expensive" calculation:
    result = analyze(key); // ... and add to cache (unlimited, or removingEldest(imlicitely!!)):
    CACHE.put(key, result);
  }
  return result;
}
public static void main(String[] args) {
  for (String word : args) {
    System.out.println(load(word));
  }
}

Launching chrome in headless mode with selenium in Java giving error

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System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");
WebDriverManager.chromedriver().setup();
Exception in thread "Thread-3" java.lang.NullPointerException
-----------------------
System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");
WebDriverManager.chromedriver().setup();
Exception in thread "Thread-3" java.lang.NullPointerException
-----------------------
System.setProperty("webdriver.chrome.driver", "src/main/extras/chromedriver.exe");
WebDriverManager.chromedriver().setup();
Exception in thread "Thread-3" java.lang.NullPointerException

How to import a file from another directory in Kotlin?

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// TODO: replace this dummy task with the task from your Rust project which
//  generates the Kotlin source directory. Make sure that the generated
//  directory (with the Kotlin file(s)) is the task output directory.
val rustTask by tasks.registering(Copy::class) {
    // To test this, I had simply put a Kotlin file into this "somewhere"
    // directory.
    from("somewhere")
    into(temporaryDir)
}

sourceSets {
    main {
        java {
            srcDir(rustTask)
        }
    }
}

tasks {
    compileKotlin {
        dependsOn(rustTask)
    }
}

Abstract database methods must return a @Dao annotated class or interface

copy iconCopydownload iconDownload
abstract var connectDatabaseDao:ConnectDatabaseDao
abstract fun getConnectDatabaseDao(): ConnectDatabaseDao
-----------------------
abstract var connectDatabaseDao:ConnectDatabaseDao
abstract fun getConnectDatabaseDao(): ConnectDatabaseDao

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QUESTION

Dart Flutter FAILURE: Build failed with an exception. Error

Asked 2022-Mar-23 at 08:45

I took a few steps to publish my app on Play Store. Since making them, I've been getting errors when converting codes to APK.

I did the steps here: https://docs.flutter.dev/deployment/android#configure-signing-in-gradle


Error:

PS C:\Users\emiry\Desktop\KelimeOgren\kelimeogrenmeuygulamasi> flutter build appbundle

 Building with sound null safety 


FAILURE: Build failed with an exception.

Execution failed for task ':app:validateSigningRelease'.
> Keystore file not set for signing config release

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BU�LD FAILED in 3s
Running Gradle task 'bundleRelease'...                              4,8s
Gradle task bundleRelease failed with exit code 1

enter image description here

key.properties:

storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=/key.jks

android/app/build.gradle:

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'com.google.gms.google-services'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion flutter.compileSdkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        applicationId "com.example.secureAppId"
        minSdkVersion 21
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
        multiDexEnabled true
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }
    buildTypes {
        release {
            signingConfig signingConfigs.release
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava'
    implementation "androidx.multidex:multidex:2.0.1"
    implementation 'com.google.firebase:firebase-analytics:19.0.2'
    implementation 'com.google.firebase:firebase-messaging:22.0.0'
    implementation platform("com.google.firebase:firebase-bom:29.2.1")
}

android/build.gradle:

buildscript {
    ext.kotlin_version = '1.5.0'
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

I will publish the app on Google Play Store. https://docs.flutter.dev/deployment/android#configure-signing-in-gradle I did the ones in this link.

What is the problem? How can I solve it? Thank you very much in advance for the help.

ANSWER

Answered 2022-Mar-22 at 22:25

Put both key.properties and key.jks files directly to the android folder , not inside src. And, in the key.properties file, do the following:

storePassword=secure
keyPassword=secure
keyAlias=key
storeFile=../key.jks

Source https://stackoverflow.com/questions/71579313

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install guava

Snapshots of Guava built from the master branch are available through Maven using version HEAD-jre-SNAPSHOT, or HEAD-android-SNAPSHOT for the Android flavor.
Snapshot API Docs: guava
Snapshot API Diffs: guava

Support

Snapshots of Guava built from the master branch are available through Maven using version HEAD-jre-SNAPSHOT, or HEAD-android-SNAPSHOT for the Android flavor.

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