线程-----多线程循环打印ABC10次总结

问题：开启3个线程，这3个线程的ID分别为A.B.C,每个线程将自己的ID依次在屏幕上打印10次，要求输出结果必须按照ABC的顺序显示

方法一：

//ThreadName类public class ThreadName0511 { private Integer index; //当前执行线程IDpublic Integer getIndex() { return index; }public void setIndex(Integer index) { this.index = index; } } //ThreadDemo类 public class ThreadDemo0511 extends Thread { private ThreadName0511 threadName; //线程间传递对象 private Integer number; //当前线程编号//构造函数 public ThreadDemo0511(ThreadName0511 threadName,Integer number) { this.threadName = threadName; this.number = number; }@Override public void run() { int i = 1; while(i <= 10) { synchronized (threadName){ //如果当前的线程编号不是所需要的线程编号，就调用wait()方法 while (number != threadName.getIndex()){ try{ threadName.wait(); } catch (InterruptedException e) { e.printStackTrace(); } } //否则就打印 System.out.print(Thread.currentThread().getName()); //下一个线程的编号 threadName.setIndex((number+1)%3); threadName.notifyAll(); i++; } } } }//主函数 public class ThreadTest511 { public static void main(String[] args) { ThreadName0511 threadName = new ThreadName0511(); threadName.setIndex(0); Thread T0 = new Thread(new ThreadDemo0511(threadName,0)); Thread T1 = new Thread(new ThreadDemo0511(threadName,1)); Thread T2 = new Thread(new ThreadDemo0511(threadName,2)); T0.setName("A"); T1.setName("B"); T2.setName("C"); T0.start(); T1.start(); T2.start(); } }

【线程-----多线程循环打印ABC10次】打印结果：

文章图片

方法二：

public class TestABC { private static int COUNT= 0; public static void main(String[] args) { Lock lock = new Lock(); Thread thread1 = new Thread(new Runnable(){ @Override public void run() { while(COUNT <= 30) { try { lock.lock(); if(COUNT %3==0) { System.out.print("A"); COUNT ++; } lock.unlock(); } catch (InterruptedException e) { e.printStackTrace(); } } } }); Thread thread2= new Thread(new Runnable(){ @Override public void run() { while(COUNT <= 30) { try { lock.lock(); if(COUNT%3==1) { System.out.print("B"); COUNT++; } lock.unlock(); } catch (InterruptedException e) { e.printStackTrace(); } } } }); Thread thread3 = new Thread(new Runnable(){ @Override public void run() { while(COUNT <= 30) { try { lock.lock(); if(COUNT%3==2) { System.out.print("C"); COUNT++; } lock.unlock(); } catch (InterruptedException e) { e.printStackTrace(); } } } }); thread1.start(); thread2.start(); thread3.start(); } }