Daemon threads spawn other daemon threads : Simple Threads « Threads « Java

Daemon threads spawn other daemon threads

Daemon threads spawn other daemon threads

// : 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() {

  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)

class DaemonSpawn extends Thread {
  public DaemonSpawn(int i) {
    System.out.println("DaemonSpawn " + i + " started");

  public void run() {
    while (true)

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:
} ///:~


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