package ch12; public class SleepText { public static void main(String[] args) { System.out.println("主线程启动:"); Thread t1 = new Thread(new SleepRunner()); t1.start(); for(int i=1;i<=50;i++) { System.out.println(Thread.currentThread().getName()+":"+i); if(i==30) { try { t1.join();//把子线程加入到主线程中执行 } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } System.out.println("启动一个新的线程t1。。。。"); Thread t2= new Thread(new NRunner()); t2.start(); System.out.println("启动一个新的线程t2。。。。"); } } class SleepRunner implements Runnable { @Override public void run() { // TODO Auto-generated method stub try { Thread.sleep(100);//休眠100ms } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } for(int i=0;i<1000;i++) { System.out.println("SleepRunner:"+i); } } } class NRunner extends Thread { @Override public void run() { // TODO Auto-generated method stub for(int i=0;i<1000;i++) { System.out.println(Thread.currentThread().getName()+":"+i); if(i%10==0) { Thread.yield();//如果i能被10整除,则当前线程让步给其他线程 } } } }