能停止的线程——在沉睡中停止（菜鸟玩线程）

小咪咪 2024-02-19 12:56 24阅读 0赞

## 能停止的线程\_在沉睡中停止 ##

#### 1.`先sleep再用interrupt()停止` ####

实现代码如下：

##### `自定义线程类` #####

package com.thread6;
    
    public class MyThread extends Thread {
        
        @Override
        public void run() {
        
            super.run();
            try {
        
                System.out.println("run begin");
                Thread.sleep(200000);
                System.out.println("run end");
            } catch (InterruptedException e) {
        
                System.out.println("在沉睡中停止！进入catch！" + this.isInterrupted());
                e.printStackTrace();
            }
        }
    }

##### `启动类` #####

package com.thread6;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.PrintStream;
    
    public class Run {
        
        public static void main(String[] args) {
        
    
            File f = new File("out.txt");
            try {
        
                f.createNewFile();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
            FileOutputStream fileOutputStream = null;
            try {
        
                fileOutputStream = new FileOutputStream(f);
            } catch (FileNotFoundException e) {
        
                e.printStackTrace();
            }
            PrintStream printStream = new PrintStream(fileOutputStream);
            System.setOut(printStream);
    
            try {
        
                MyThread myThread = new MyThread();
                myThread.start();
                Thread.sleep(200);
                myThread.interrupt();
            } catch (InterruptedException e) {
        
                System.out.println("main catch");
                e.printStackTrace();
            }
            System.out.println("end!!");
        }
    }

##### `执行结果` #####

run begin
    end!!
    在沉睡中停止！进入catch！false

##### `结论` #####

`从打印结果看，如果在sleep状态下停止某一线程，会进入catch语句，并且清楚停止状态值，使之变为false。`

#### 2.`先interrupt()停止再sleep` ####

上一个demo是先sleep然后再用interrupt()停止，与之相反的操作也要进行注意。

##### `自定义线程类` #####

package com.thread6;
    
    public class MyThread extends Thread {
        
        @Override
        public void run() {
        
            super.run();
            try {
        
                for (int i = 0; i < 100000; i++) {
        
                    System.out.println("i=" + (i + 1));
                }
                System.out.println("run begin");
                Thread.sleep(200000);
                System.out.println("run end");
            } catch (InterruptedException e) {
        
                System.out.println("在沉睡中停止！进入catch！" + this.isInterrupted());
                e.printStackTrace();
            }
        }
    }

##### `启动类` #####

package com.fiberhome.thread6;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.PrintStream;
    
    public class Run {
        
        public static void main(String[] args) {
        
    
            File f = new File("out.txt");
            try {
        
                f.createNewFile();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
            FileOutputStream fileOutputStream = null;
            try {
        
                fileOutputStream = new FileOutputStream(f);
            } catch (FileNotFoundException e) {
        
                e.printStackTrace();
            }
            PrintStream printStream = new PrintStream(fileOutputStream);
            System.setOut(printStream);
    	   //开启线程
            MyThread myThread = new MyThread();
            myThread.start();
            myThread.interrupt();
            System.out.println("end!!");
        }
    }

##### `执行结果` #####

i=99985
    i=99986
    i=99987
    i=99988
    i=99989
    i=99990
    i=99991
    i=99992
    i=99993
    i=99994
    i=99995
    i=99996
    i=99997
    i=99998
    i=99999
    i=100000
    run begin
    在沉睡中停止！进入catch！false