Debugging Multi-threaded Java Applications

InterThread.java

package ani_test;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

class executer implements Runnable {

    int id = 0;
    executer(int id) {
        System.out.println("Inside Executer -->>");
        this.id = id;
    }
    @Override
    public void run() {
        Thread.currentThread().setName("D3f4ult_" + id);
        System.out.println("EXECUTER HIT id = " + this.id);
    }
}
public class InterThread {

    public static void main(String[] args) {
        ExecutorService aa = Executors.newFixedThreadPool(5);
        for (int i = 0; i < 5; i++) {
            aa.execute(new executer(i));
        }
        aa.shutdown();
    }

}