// : c13:Daemons.java
// Daemon threads spawn other daemon threads.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
class Daemon extends Thread {
private Thread[] t = new Thread[10];
public Daemon() {
setDaemon(true);
start();
}
public void run() {
for (int i = 0; i < t.length; i++)
t[i] = new DaemonSpawn(i);
for (int i = 0; i < t.length; i++)
System.out.println("t[" + i + "].isDaemon() = " + t[i].isDaemon());
while (true)
yield();
}
}
class DaemonSpawn extends Thread {
public DaemonSpawn(int i) {
start();
System.out.println("DaemonSpawn " + i + " started");
}
public void run() {
while (true)
yield();
}
}
public class Daemons {
public static void main(String[] args) throws Exception {
Thread d = new Daemon();
System.out.println("d.isDaemon() = " + d.isDaemon());
// Allow the daemon threads to
// finish their startup processes:
Thread.sleep(1000);
}
} ///:~