标签：except package todo start ack for interrupt his catch
package com.cn.test.thread; public class TestJoin extends Thread{ private String name; public TestJoin(String name) { this.name = name; } public static void main(String[] args) { TestJoin join1 = new TestJoin("thread-1"); TestJoin join2 = new TestJoin("thread-2"); join1.start(); join2.start(); try { join1.join(); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("main--------------------线程"); } @Override public void run() { for (int i=0; i<3; i++) { System.out.println(Thread.currentThread().getName() + "i=" + i) ; } } }
上述例子中： 在main方法中join1线程调用join方法，如果main方法抢到cpu的执行权，会将cpu的执行权让出来给join1线程，直到join1线程执行完毕之后才进行main线程的执行。join1和join2是同步进行竞争cpu的资源。
运行结果：
Thread-0i=0 Thread-1i=0 Thread-0i=1 Thread-1i=1 Thread-0i=2 Thread-1i=2 main--------------------线程
main线程需要等待join1线程执行完毕之后才能进行执行
Thread的join方法在start方法之前进行执行，不会触发这种cpu让出执行权的操作，此时和mian线程是并发执行的。
package com.cn.test.thread;
public class TestJoin extends Thread{
private String name;
public TestJoin(String name) {
this.name = name;
}
public static void main(String[] args) {
TestJoin join1 = new TestJoin("thread-1");
TestJoin join2 = new TestJoin("thread-2");
try {
join1.join();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
join1.start();
join2.start();
System.out.println("main--------------------线程");
}
@Override
public void run() {
for (int i=0; i<3; i++) {
System.out.println(Thread.currentThread().getName() + "i=" + i) ;
}
}
}
执行结果：
main--------------------线程 Thread-1i=0 Thread-1i=1 Thread-1i=2 Thread-0i=0 Thread-0i=1 Thread-0i=2
总结：join方法可以控制多线程的执行顺序。
标签：except package todo start ack for interrupt his catch
原文地址：https://www.cnblogs.com/startSeven/p/10213645.html
