java多线程 基础demo

join()

让主进程等待子进程全部执行完

例子如下：

package mocker;
public class TestThread5 extends Thread {
 private String name;
 public TestThread5(String name) {
 super(name);
 this.name = name;
     }
 @Override
 public void run() {
          System.out.println(Thread.currentThread().getName() + "线程运行开始 ");
 for (int i = 0; i < 5; i++) {
              System.out.println("子线程" + name + "运行： " + i);
 try {
 sleep((int) Math.random() * 10);
              } catch (InterruptedException e) {
 e.printStackTrace();
              }
          }
          System.out.println(Thread.currentThread().getName() + "线程运行结束");
     }
 public static void main(String[] args) {
          System.out.println(Thread.currentThread().getName() + "主线程运行开始!");
          TestThread5 mTh1 = new TestThread5("A");
          TestThread5 mTh2 = new TestThread5("B");
 mTh1.start();
 mTh2.start();
 try{
 mTh1.join();
          }catch(InterruptedException e){
 e.printStackTrace();
          }
 try{
 mTh2.join();
          }catch(InterruptedException e){
 e.printStackTrace();
          }
          System.out.println(Thread.currentThread().getName() + "主线程运行结束!");
     }
}