多线程管理

线程状态

线程相关Api

线程终止

线程分类

守护线程不是自己关闭的情况下，强制终止资源会得不到释放。

package daemon;

public class ThreadDemo4
{
    public static void main(String args[]) throws InterruptedException
    {
        TestThread4 t = new TestThread4();
        t.setDaemon(true);//守护线程开启
        t.start();
        Thread.sleep(2000);
        System.out.println("main thread is exiting");
    }
}
 class TestThread4 extends Thread
{
    public void run() 
    {
        while(true)
        {
            System.out.println("TestThread4" + 
            "　is running");
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}