如何正确的停止线程

废弃的方法：

1. Thread.stop
2. Thread.suspend
3. Thread.resume

可用的方法：

1. 标志位
2. interrupt();

例1    标志位+return

public class C {
    public static void main(String[] args) {
        Thread t = new Thread() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                for (int i = 0; i < 100; i++) {
                    System.out.println("线程" + Thread.currentThread().getName()
                            + ":" + i);
                    if (i == 20) {
                        // break;
                        return;
                    }
                }
            }
 
        };
        t.start();
    }
}

 

输出：

线程Thread-0:0

线程Thread-0:1

线程Thread-0:2

……

线程Thread-0:20

 

 

例2    标志位+break

public class C {
 
    public static void main(String[] args) {
        Thread t = new Thread() {
 
            private boolean finished;
 
            @Override
            public void run() {
                // TODO Auto-generated method stub
                while (true) {
                    doSomeWork();
                    if (finished) {
                        System.out.println("线程终止");
                        System.err.println("sssssssssss");
                        break;
                    }
                }
            }
 
            private void doSomeWork() {
                System.out.println("doSomeWork");
                finished = true;
            }
        };
        t.start();
    }
}

 

输出：

doSomeWork

线程终止

sssssssssss

 

 

例3   interrupt()

public class C {
    public static void main(String[] args) {
        Thread t = new Thread() {
            @Override
            public void run() {
                // TODO Auto-generated method stub
                for (int i = 0; i < 100; i++) {
                     try{
                         Thread.sleep(1000);
                         if(i==5)
                             Thread.currentThread().interrupt();
                     }catch(InterruptedException e){
                         System.out.println("异常抛出！");
                         throw new RuntimeException();
                     }
                     System.out.println("线程："+i);
                }
            }
 
        };
        t.start();
    }
}

 

输出：

线程：0

线程：1

线程：2

线程：3

线程：4

线程：5

异常抛出！

Exception in thread "Thread-0" java.lang.RuntimeException

    at c14.C$1.run(C.java:22)