JAVA学习之后台线程

JAVA后台线程的特点是只有所有的前台线程结束运行，后台线程才能结束，后台线程可用setDaemon()进行设置：

package withdaemon;

public class Machine extends Thread {
    private int a;
    private static int count;
    
    public void start() {
        super.start();
        Thread deamon=new Thread() {
        public void run() {
            while(true) {
                reset();
                try {
                    sleep(1000);
                } catch (InterruptedException e) {throw new RuntimeException(e);}
            }
        }
    };
    deamon.setDaemon(true);
    deamon.start();
}
    
    public void reset() {a=0;}
    public void run() {
        while (true) {
            System.out.println(getName()+":"+a++);
            if (count++==100) break;
            yield();
        }
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Machine machine=new Machine();
        machine.start();
    }
}