JRE

Java Runtime Environment (JRE) for WacOS

WacOS will optionally allow you to install most versions of Java along with the system, either at installation or after. A JRE will be maintained here that handles Java throughout the system.

This feature is currently in development, and is in the planning phase.

Java packages

The following Java packages are supported

JDK

Java Development Kit (JDK) packages are listed here

JDK 13 for Linux.??

JDK 12 for Linux.??

JDK 11 for Linux.??

JDK 10 for Linux.??

JDK 9 for Linux.??

JDK 8 for Linux.??

JDK 7 for Linux.??

JDK 6 for Linux.??

JSE

The following Java Standard Edition environment packages are listed here

JSE 13 for Linux.??

JSE 12 for Linux.??

JSE 11 for Linux.??

JSE 10 for Linux.??

JSE 9 for Linux.??

JSE 8 for Linux.??

JSE 7 for Linux.??

JSE 6 for Linux.??

Test program

Use this Hello World program to test your installation:

public class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Prints the string to the console.
    }
}

Or do a more advanced test:

// This is an example of a single line comment using two slashes

/*
 * This is an example of a multiple line comment using the slash and asterisk.
 * This type of comment can be used to hold a lot of information or deactivate
 * code, but it is very important to remember to close the comment.
 */

package fibsandlies;

import java.util.Map;
import java.util.HashMap;

/**
 * This is an example of a Javadoc comment; Javadoc can compile documentation
 * from this text. Javadoc comments must immediately precede the class, method,
 * or field being documented.
 * @author Wikipedia Volunteers
 */
public class FibCalculator extends Fibonacci implements Calculator {
    private static Map<Integer, Integer> memoized = new HashMap<>();

    /*
     * The main method written as follows is used by the JVM as a starting point
     * for the program.
     */
    public static void main(String[] args) {
        memoized.put(1, 1);
        memoized.put(2, 1);
        System.out.println(fibonacci(12)); // Get the 12th Fibonacci number and print to console
    }

    /**
     * An example of a method written in Java, wrapped in a class.
     * Given a non-negative number FIBINDEX, returns
     * the Nth Fibonacci number, where N equals FIBINDEX.
     * 
     * @param fibIndex The index of the Fibonacci number
     * @return the Fibonacci number
     */
    public static int fibonacci(int fibIndex) {
        if (memoized.containsKey(fibIndex)) return memoized.get(fibIndex);
        else {
            int answer = fibonacci(fibIndex - 1) + fibonacci(fibIndex - 2);
            memoized.put(fibIndex, answer);
            return answer;
        }
    }
}