learn-java | example of learn java | Learning library
kandi X-RAY | learn-java Summary
kandi X-RAY | learn-java Summary
example of learn java
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Top functions reviewed by kandi - BETA
- Adds two nodes
- Fixes the left value
- Main method for testing
- Checks if the string is an amanda winner
learn-java Key Features
learn-java Examples and Code Snippets
Lines of Code : 34
License : No License
Copypublic static void main(String[] args) {
int month = 25;
int year = 2001;
int numDays = 0;
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
numDays = 31;
break;
case 4:
case 6:
case 9:
ca public static void main( String[] args ) {
/**
* InputStreamReader ir = new InputStreamReader( System.in );
* BufferedReader br = new BufferedReader(ir);
*/
BufferedReader br = new BufferedReader( new InputStreamReader( System.in ) );
public static void main( String args[] ) {
try {
FileInputStream fin = new FileInputStream( "D:\\bstud.txt" );
BufferedInputStream bin = new BufferedInputStream( fin );
int i;
while ( ( i = bin.read( ) ) != -1 ) {
System.out.print Community Discussions
Trending Discussions on learn-java
QUESTION
I'm getting an error while building angular app using --prod flag. I'm unable to get to any point since stack show error at lower compiler level. What is causing the errors?
When I run ng build without --prod flag, it would compile without any error.
Following warning is logged before error:
...ANSWER
Answered 2019-Aug-29 at 22:45Your todo-date-service.ts constructor is definitely incorrect:
QUESTION
Am doing a (highly recommended) Javascript tutorial (http://www.newthinktank.com/2015/09/learn-javascript-one-video/) and one of the solutions doesn't work. I'm trying to change the background colour of the first paragraph, I don't get any errors and 'developer tools' shows me that the 'style' just doesn't updated. I even copied the code from the cheat-sheet and it still doesn't work. Not sure it's a version problem or just a genuine mistake (it's been viewed over 1,000,000 times so I'm sure someone would have picked up on it by now). Here's the code:
...ANSWER
Answered 2018-Sep-07 at 07:47The problem is that the first child node is a Text node (containing the whitespace after
), not an element:
QUESTION
I'm currently trying to return every first character of each string in the animals array and storing in a new array called secretMessage using shorthand arrow function syntax. But, I run into the following error.
Error
...ANSWER
Answered 2017-Sep-23 at 20:04Remove the word return.
secretMessage.map(animal => animal[0]);
The fat arrow function automatically returns the expression.
You only need the return if the function is wrapped in a block:
QUESTION
ANSWER
Answered 2018-May-25 at 03:07I think you are just getting confused with the array part.
Array in java is a special object that contains references to other objects.
You can very well change those "child" object's values as with any Object.
Remember this thumb rule that I keep to avoid confusion:
It doesn't matter what you do directly with the object but what you do inside it
Meaning that if you do some changes inside of any sub-object (or array item in your case) you'd see the side effects of it in your caller.
QUESTION
My company's legacy code is suffering from prevalent usage of instanceof switch-casing, in the form of:
...ANSWER
Answered 2018-Apr-07 at 20:36Seems like polymorphism. Such code could stem from a heterogene set of business object classes, like Excel ReportX, Zip, TableY, and actions like Open, Close, Save and such.
As it is, this kind of programming causes a huge coupling between classes, and has issues with completeness of all cases, extendibility.
In the case of polymorphism the actual wrapper for some bussiness object should provide Actions (Open, Save, Close).
This mechanism is similar to java swing, where an edit field has its list of actions (Cut, Copy, Paste and such), and a tree view an overlapping set of actions. Depending on the focus the actual actions will be installed in the menu actions.
A declarative specification might be in order: say an XML that "holds" beans and their actions.
Should you have some MVC paradigm on the radar, consider the following: every action could have parameters. Use PMVC (my idea), a Parameters class apart from the Model class, as those infos have a different life cycle, and are constant.
The road hereto could be:
- a prototype with two business objects and two actions.
- refactoring with one polymorph business object containing all (old code).
- slowly moving one class after another to their own business object.
- the first removal from the polymorph business object being used to clean up the new architecture.
I would refrain from using inheritance (a BaseDocument with open/save) as this probably does not fit a more heterogeneous reality, and could cause parallel class hierarchies (XDoc with XContainer and XObject).
How it is actually done is still your work. I also would be eager to learn whether there exists an established paradigm.
Asked pseudo-code One would need a bit of analysis with some prototype made - a proof of concept. However there is a discovery of (dynamic) capabilities/features.
QUESTION
I am trying to understand the exact scenario when a class get loaded and initialized. I see the two articles below give different answers
javarevisited-A Class is initialized in Java whenan Instance of class is created using either new() keyword or using reflection using class.forName(), which may throw ClassNotFoundException in Java.
Java world-So when are classes loaded? There are exactly two cases: when the new bytecode is executed (for example, FooClass f = new FooClass();) and when the bytecodes make a static reference to a class (for example, System.out).
So when I create an instance of class using new keyword is class loaded or initialized?
Another thing to ask regarding loading due to reference variable:
javarevisited-Class loading is done by Class Loaders in Java which can be implemented to eagerly load a class as soon as another class references it or lazy load the class until a need of class initialization occurs
What does author mean by referencing here? Does he imply if A class have reference variable of B class then B class get loaded when its reference is encountered in A ??
But the author below says class NotUsed is not loaded but I see ClassInitializationTest class having its reference
/** * Java class which is not used in this program, consequently not loaded by JVM */
...ANSWER
Answered 2017-Aug-09 at 19:28myClass a = new myClass();
QUESTION
This is going to be a long question, driven by the thirst of wanting to know how something is working against the conventional methodologies.
I came across a very interesting application codeacademy, that was actually testing the local variables within a main method. Here is a screenshot of the page, that got me into thinking how this can be possible. found some similar questions in stackoverflow.
Is it possible to obtain variables in main method from junit test?
How to use BCEL or ASM to get the value of a local declared variable in JAVA?
I am not satisfied by knowing that it cant be done, what i want to know, is that, is there a way, like the java compiler api or some other, that can point me into knowing how such an application made is possible.
...ANSWER
Answered 2017-Dec-01 at 12:50Probably we are over-thinking this.
When I got your question, you are wondering how the online tool used here can know about the content of variables inside some main() method.
Thing is: this isn't necessarily a Java feature.
Keep in mind: it is their web application. They can do whatever they implement in there. In other words: of course you can use a Java compiler to generate an AST (abstract syntax tree) representation of any piece of Java code. And of course, that AST contains all the information that is present in the corresponding source code.
QUESTION
A bit of backstory, for those who care: some time ago I stumbled across this: https://medium.com/front-end-hacking/how-it-feels-to-learn-javascript-in-2017-a934b801fbe, and in particular, this: https://brlewis.github.io/2017/planets.html
And today I thought: CSS is perfectly capable of hiding things based on the state of checkboxes, which would achieve pretty much the same effect. The only trouble is, I have no idea whether CSS selectors are flexible enough to select the right table rows.
So, my question is this: given some HTML resembling this:
...ANSWER
Answered 2017-Sep-10 at 20:34Final Answer:
Here is my mockup of what you are trying to do. By the way Nice Question!!!
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You can use learn-java like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the learn-java component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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