Java 学习笔记之 Daemon线程

Daemon线程:

线程：

1. 用户线程
2. 守护线程

守护线程是一种特殊的线程，在进程中不存在非守护线程了，则守护线程自动销毁。

public class DaemonThread extends Thread {
    private int i = 0;

    @Override
    public void run() {
        try {
            while (true) {
                i++;
                System.out.println("i=" + (i));
                Thread.sleep(1000);
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

public class ThreadRunMain {
    public static void main(String[] args) {
        testDaemonThread();
    }

    public static void testDaemonThread() {
        try {
            DaemonThread dt = new DaemonThread();
            dt.setDaemon(true);
            dt.start();
            Thread.sleep(5000);
            System.out.println("Main thread disappear. Daemon thread will also disappear.");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

运行结果：