MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.util.Map;
import java.util.WeakHashMap;

public class MainClass {
    private static Map map;

    public static void main(String args[]) {
        map = new WeakHashMap();
        map.put("A", "B");
        Runnable runner = new Runnable() {
            public void run() {
                while (map.containsKey("A")) {
                    try {
                        Thread.sleep(1000);
                        System.gc();
                    } catch (InterruptedException ignored) {
                    }
                    System.out.println("Has A");
                    System.gc();
                }
            }
        };
        Thread t = new Thread(runner);
        t.start();
        System.out.println("Main waiting");
        try {
            t.join();
        } catch (InterruptedException ignored) {
        }
        System.gc();
    }
}