高手帮忙看个问题
import java.io.*;
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);
}
}
-------------------------
上面这个程序为什么最先输出的是
d.isDaemon() = true
呢
[解决办法]
你把System.out.println("d.isDaemon() = " + d.isDaemon()); 去掉试试
