三个线程循环切换

package com.thread;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class ThreadTest3 {
	public static void main(String[] args) {
		
		final Business business=new Business();

		
		//线程三
		new Thread(new Runnable() {
			public void run() {
				for (int i = 0; i < 5; i++) {
					try {
						business.sub3(i);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
		}).start();
		//线程二
		new Thread(new Runnable() {
			public void run() {
				for (int i = 0; i < 5; i++) {
					try {
						business.sub2(i);
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}
			}
		}).start();
		

		
		//main方法本身是个线程，即线程二运行代码直接放到main方法中
		for (int i = 0; i < 5; i++) {
			try {
				business.main(i);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
	}
	
	
	static class Business{
		Lock lock=new ReentrantLock();
		Condition condition1=lock.newCondition();
		Condition condition2=lock.newCondition();
		Condition condition3=lock.newCondition();
		
		private int isSub=1;//当前运行的方法是main();
		
		//线程三
		public  void sub3(int i) throws InterruptedException {
			lock.lock();
			while (isSub!=3) {
				condition3.await();
			}
			for (int j = 0; j < 10; j++) {
				System.out.println("sub3 thread sequence is "+j+" and loop is "+i);
			}
			isSub = 1;
			condition1.signal();
			lock.unlock();
		}
		
		//线程二
		public  void sub2(int i) throws InterruptedException {
			lock.lock();
			while (isSub!=2) {
				condition2.await();
			}
			for (int j = 0; j < 10; j++) {
				System.out.println("sub2 thread sequence is "+j+" and loop is "+i);
			}
			isSub = 3;
			condition3.signal();
			lock.unlock();
		}
		
		//主线程，即main
		public  void main(int i) throws InterruptedException{
			lock.lock();
			while (isSub!=1) {
				condition1.await();
			}
			for (int j = 0; j < 10; j++) {
				System.out.println("main thread sequence is "+j+" and loop is "+i);
			}
			isSub = 2;
			condition2.signal();
			lock.unlock();
		}
	}

}