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Copy pathJoinTest.java
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51 lines (43 loc) · 1.35 KB
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package com.algorithm.demo.thread;
/**
* 现在有 T1、T2、T3 三个线程，你怎样保证 T2 在 T1 执行完后执行，T3 在 T2 执行完后执行?
*/
public class JoinTest {
public static void main(String[] args) {
Thread t1 = new Thread(new Runnable() {
@Override
public void run() {
System.out.println("t1");
}
});
Thread t2 = new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("t2 join before");
//引用t1线程，等待t1线程执行完
t1.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("t2");
}
});
Thread t3 = new Thread(new Runnable() {
@Override
public void run() {
try {
System.out.println("t3 join before");
//引用t2线程，等待t2线程执行完
t2.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("t3");
}
});
t3.start();
t1.start();
t2.start();
}
}