Java并发编程实例--3.打断一个线程
一般来讲一个java程序如果运行着多个线程,那么只有在这些线程都运行完毕后才会终止。
但有时候,我们需要去结束某个线程或者取消某个任务。此时就用到了Java线程的打断机制,即interruption。
Number 2 is Prime.
Number 3 is Prime.
Number 5 is Prime.
但有时候,我们需要去结束某个线程或者取消某个任务。此时就用到了Java线程的打断机制,即interruption。
本例中,我们将开发一个程序创建线程,5秒后将强制打断它。
PrimeGenerator.java
package com.dylan.thread.ch1.c03;
/**
* @author xusucheng
* @create 2018-04-22
**/
public class PrimeGenerator extends Thread {
@Override
public void run() {
long number = 1L;
while (true){
if(isPrime(number)){
System.out.printf("Number %d is Prime.\n", number);
}
//判断是否被打断
if(isInterrupted()){
System.out.printf("The Prime Generator has been Interrupted");
return;
}
number++;
}
}
private boolean isPrime(long number){
if(number<2){
return true;
}
for (long i=2;i<number;i++){
if((number%i)==0){
return false;
}
}
return true;
}
}
Main.java
package com.dylan.thread.ch1.c03;
/**
* @author xusucheng
* @create 2018-04-22
**/
public class Main {
public static void main(String[] args) {
Thread task = new PrimeGenerator();
task.start();
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
task.interrupt();
}
}
输出:
Number 1 is Prime.Number 2 is Prime.
Number 3 is Prime.
Number 5 is Prime.
......
Number 82007 is Prime.
Number 82009 is Prime.
Number 82013 is Prime.
The Prime Generator has been Interrupted