java-tutorial | For a current sample , see https | Learning library

 by   jasonjoh Java Version: Current License: No License

kandi X-RAY | java-tutorial Summary

kandi X-RAY | java-tutorial Summary

java-tutorial is a Java library typically used in Tutorial, Learning applications. java-tutorial has no bugs, it has no vulnerabilities, it has build file available and it has low support. You can download it from GitHub.

For a current sample, see

            kandi-support Support

              java-tutorial has a low active ecosystem.
              It has 31 star(s) with 19 fork(s). There are 7 watchers for this library.
              It had no major release in the last 6 months.
              There are 0 open issues and 2 have been closed. On average issues are closed in 307 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of java-tutorial is current.

            kandi-Quality Quality

              java-tutorial has 0 bugs and 0 code smells.

            kandi-Security Security

              java-tutorial has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              java-tutorial code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              java-tutorial does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              java-tutorial releases are not available. You will need to build from source code and install.
              Build file is available. You can build the component from source.
              Installation instructions are available. Examples and code snippets are not available.
              java-tutorial saves you 539 person hours of effort in developing the same functionality from scratch.
              It has 1262 lines of code, 111 functions and 29 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed java-tutorial and discovered the below as its top functions. This is intended to give you an instant insight into java-tutorial implemented functionality, and help decide if they suit your requirements.
            • Organises an authorization token
            • Generates an access token from the given authorization code
            • Parses an encoded token and returns the id token
            • Loads authentication configuration from the classpath
            • Gets the contacts list
            • Get the expiration time
            • Gets the access token
            • Gets the email service
            • Gets the email
            • Ensures that the given tokens are valid
            • Gets the refresh token
            • Display the page
            • Returns a full URL to retrieve the full login url
            • Creates a comma - separated list of available scopes
            • Set the expiration time in milliseconds
            • Gets the events
            • Logout the current request
            Get all kandi verified functions for this library.

            java-tutorial Key Features

            No Key Features are available at this moment for java-tutorial.

            java-tutorial Examples and Code Snippets

            No Code Snippets are available at this moment for java-tutorial.

            Community Discussions


            Why am I getting parse error on input "{"
            Asked 2022-Mar-07 at 21:28

            I am trying to run the very first example in this tutorial:

            Call JVM Methods from Haskell



            Answered 2022-Mar-07 at 21:28

            The {-# LANGUAGE … #-} and {-# OPTIONS_GHC … #-} pragmas need to be defined before the module Main declaration. Otherwise it will not enable the QuasiQuotes language extension, and thus not understand the quasiquotes used in the program.

            If you install the inline-java and put the language pragmas before the module Main:



            VS Code Java SDK Creates Project Errors on Default Components (Main Method, Double, String etc.)
            Asked 2022-Jan-18 at 11:08

            Environment: I had a series of unexplainable errors on a macOS system running macOS Big Sur and while I was trying to run my application using this guide from the official VS Code website.

            Issue: Every time I opened a certainly working project in VS Code (tested in the IntelliJ IDE), it was full of errors like String is not a known class or main method not defined in class etc.

            Understanding the Problem: I quickly figured out that the issue has to do with the JDK being misconfigured, and now I had to figure out if the issue was in VS Code or Homebrew. The issue I suspected lied in VS Code and originated from my choice to use a JDK downloaded and managed by the Homebrew package manager. After verifying my Homebrew installation of the given cask and making sure system paths were set correctly, I was certain of the previously made assumption.



            Answered 2022-Jan-17 at 14:14


            1. Open the folder in VS Code
            2. Collapse the Java Projects Tab in the Explorer menu (make sure you have the [java language package extension][3] downloaded)
            3. Click the three dots icon '...' which appears when you hover over the Java Projects area with your mouse.
            4. Select 'Configure Java Runtime'. A new tab will open.
            5. On the Java Version column, select the pencil icon.
            6. Open the dropdown menu and select a Java Version from the Java Virtual Machines folder instead of opt/Homebrew directories (it may be the same JDK from Homebrew using an alias, but VS Code expects the Virtual Machine folder and that is my theory in why this works).



            Background removal from images with OpenCV in Android
            Asked 2021-May-14 at 12:25

            I want to remove image background with Open CV in Android. Code is working fine but output quality not as per expectation. I followed java documentation for code reference:



            original Image

            My output Expected output

            My code snippet in Android:



            Answered 2021-May-11 at 02:14

            The task, as you have seen, is not trivial at all. OpenCV has a segmentation algorithm called "GrabCut" that tries to solve this particular problem. The algorithm is pretty good at classifying background and foreground pixels, however it needs very specific information to work. It can operate on two modes:

            • 1st Mode (Mask Mode): Using a Binary Mask (same size as the original input) where 100% definite background pixels are marked, as well as 100% definite foreground pixels. You don't have to mark every pixel on the image, just a region where you are sure the algorithm will find either class of pixels.

            • 2nd Mode (Foreground ROI): Using a bounding box that encloses 100% definite foreground pixels.

            Now, I use the notation "100% definitive" to label those pixels you are 100% sure they correspond to either the background of foreground. The algorithm classifies the pixels in four possible classes: "Definite Background", "Probable Background", "Definite Foreground" and "Probable Foreground". It will predict both Probable Background and Probable Foreground pixels, but it needs a priori information of where to find at least "Definitive Foreground" pixels.

            With that said, we can use GrabCut in its 2nd mode (Rectangle ROI) to try an segment the input image . We can try and get a first, rough, binary mask of the input. This will mark where we are sure the algorithm can find foreground pixels. We will feed this rough mask to the algorithm and check out the results. Now, the method is not easy and its automation not straightforward, there's some manual information we will set that work particularly well for this input image. I don't know the Java implementation of OpenCV, so I'm giving you the solution for Python. Hopefully you will be able to port it. This is the general outline of the algorithm:

            1. Get a first rough mask of the foreground object via thresholding
            2. Detect contours on the rough mask to retrieve a bounding rectangle
            3. The bounding rectangle will serve as input ROI for the GrabCut algorithm
            4. Set the parameters needed for the GrabCut algorithm
            5. Clean the segmentation mask obtained by GrabCut
            6. Use the segmentation mask to finally segment the foreground object

            This is the code:



            java.home variable does not point to a JDK Source
            Asked 2020-Oct-23 at 20:20

            I have used java on many IDEs but I simply cannot on VS Code/linux. Before you tell me to just google it/remove my post, I've already read the similar stack overflow question, java tutorial VS Code, and setting java.home by oracle.The actual stack overflow post wasn't even answered even though it was marked solved.

            I am running VS Code on windows and running all my coding in VSCode in a WSL, basically Ubuntu for windows. I installed the Java Extension Pack. I installed the jdk in my root directory and defined the path in settings.json as such



            Answered 2020-Jun-09 at 20:06

            I figured it out, it wasn't installed correctly. I copied the windows installation jdk rather than installing the .rpm jdk via Alien. After proper installation it was installed in /usr/java/jdk-14.0.1, so I used that as the path.



            VS Code & WSL2 - specify Java Language Level to 1.8
            Asked 2020-Oct-08 at 23:57

            I'm using VS Code in WSL2 and have installed a bunch of Java Extensions as per this link - normal Java programs work well - able to Run & Debug from VS Code.

            Although when I start using Java 8 specific features like Lambda, it starts complaining about the source level for Java

            I've the following environment variables configured for Java Home

            What property should be specified in Settings to determine the source level as 1.8 and not lower !

            Edit: The bottom blue bar says the current Java Runtime is J2SE1.5 for some reason. See Attached

            On clicking, it asks to add the following property: java.configuration.runtimes and so I've added the following in my WSL2 settings for VS Code - still no effect !



            Answered 2020-Jun-05 at 15:21

            I use the spring framework with gradle, lombok plugin and skdman (aside gradle, for maven is as good as well, I recommend use'em, they are all great), but I believe my configurations can be useful for everyone, so here it goes ...

            One thing I may add thought its I got strange errors using plugins with command line gradle wich was corrected when i start using the vscode plugins interfaces only, therefor i would recommend give it a try and use the plugins buttons, if you have not done it yet.

            At launch.json I have the following debug configurations:



            Set target java version when build OpenCV with brew
            Asked 2020-Jun-13 at 07:42

            I'm using brew to build OpenCV with java support following this tutorial. After built successful I got the error class file has wrong version 57.0, should be 52.0 when using. I'm using OpenJDK 8, how can I target the build to this version. Thank you.



            Answered 2020-Jun-13 at 07:42

            Found the answer, put the extra -DOPENCV_JAVA_TARGET_VERSION=1.8 args to cmake in brew formula.



            Escaping references - how to legitimately update object data?
            Asked 2020-May-17 at 06:29

            Been reading and watching escaping references and I get the idea of why and how to fix it, but I'm still confused on one thing...

            What if the data does need to be updated? For example, I copied the code from the blog post down below and also added an additional class member of "email". Say the customer changed his email address. If this structure does not allow the object to be modified, how it the update done then?




            Answered 2020-May-17 at 06:29

            Java solves both issues presented in that article:

            • Shallowly immutable data holders ➙ Records
            • Read-only maps ➙ Map.copyOf

            Leaking references is an important issue. But that article’s solution seems overwrought to me in its approach.

            • Certainly creating the CustomerRecords to hold a map seems redundant and useless. Instead, use a non-modifiable map (discussed below).
            • As for a "read-only" interface as view onto a mutable object, this might make sense in some limited situations. But you might also wreak havoc when the supposedly immutable "CustomerReadOnly" returns a different email address on the second call to "getEmail" after an update. Trying to be simultaneously both mutable and immutable is unwise. To handle immutability, instead make an immutable copy of the mutable state.

            The Records feature being previewed in Java 14 and previewed again in Java 15, and discussed by Brian Goetz, provide for shallowly immutable data holders. This special kind of class handles automatically the constructor, “getter” accessors, equals, hashCode, and toString methods behind the scenes. So your example class Customer turns into this utterly simple code:



            How to Run Java Module class (java 9 jigsaw project) with third party library (jar files)?
            Asked 2020-Apr-12 at 11:02

            Right now I'm trying to develop a Java project with pure java (no builtscript). I'm implementing the module concept from Java 9. I'm having a trouble when it comes to run a Java project (main class) with additional jar file (third party library). I have no trouble when compiling but when I try to run the java it couldn't run as expected.

            I could compile this project by executing this command (javaFiles.txt contains my java files that wanted to be compiled):



            Answered 2020-Feb-27 at 07:49

            The path separator in all non-Windows systems is colon (:), not semicolon (;). You need to change this:


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


            No vulnerabilities reported

            Install java-tutorial

            The sample code in this repository is the end result of going through the Java tutorial on the Outlook Dev Center. If you go through that tutorial yourself, you should end up with code very similar to this. If you download or fork this repository, you'll need to follow the steps in Configure the sample to run it. NOTE: Looking for the version of this tutorial that used the Outlook API directly instead of Microsoft Graph? Check out the outlook-api branch. Note that Microsoft recommends using the Microsoft Graph to access mail, calendar, and contacts. You should use the Outlook APIs directly (via only if you require a feature that is not available on the Graph endpoints.


            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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