package concurrency;

import java.io.*;

import java.util.concurrent.*;

import net.mindview.util.*;

/**

* RUN:

* javac concurrency/Daemons.java && java concurrency.Daemons

*

* OUTPUT:

* d.isDaemon() = true

* DaemonSpawn 0 started, DaemonSpawn 1 started, DaemonSpawn 2 started, DaemonSpawn 3 started,

* DaemonSpawn 4 started, DaemonSpawn 5 started, DaemonSpawn 6 started, DaemonSpawn 7 started,

* DaemonSpawn 8 started, DaemonSpawn 9 started,

* t[0].isDaemon() = true, t[1].isDaemon() = true, t[2].isDaemon() = true, t[3].isDaemon() = true,

* t[4].isDaemon() = true, t[5].isDaemon() = true, t[6].isDaemon() = true, t[7].isDaemon() = true,

* t[8].isDaemon() = true, t[9].isDaemon() = true,

*/

public class Daemons {

public static void main(String[] args) throws Exception {

Thread d = new Thread(new Daemon());

d.setDaemon(true);

d.start();

System.out.println("d.isDaemon() = "+d.isDaemon());

TimeUnit.SECONDS.sleep(1);

}

}

class Daemon implements Runnable {

private Thread[] t = new Thread[10];

public void run() {

for (int i = 0; i < t.length; i++) {

t[i] = new Thread(new DaemonSpawn());

t[i].start();

System.out.print("DaemonSpawn " + i + " started, ");

}

System.out.println();

for (int i = 0; i < t.length; i++) {

System.out.print("t["+i+"].isDaemon() = "+t[i].isDaemon() + ", ");

}

while (true) {

Thread.yield();

}

}

}

class DaemonSpawn implements Runnable {

public void run() {

while (true) {

Thread.yield();

}

}

}