线程间通信

package com.thread;public class ThreadCommunication2 {	public static void main(String[] args) {		final Bussiness b = new Bussiness();				//子线程		new Thread(new Runnable() {			public void run() {				for (int i = 1; i <= 50; i++) {					b.sub(i);				}			}		}).start();		//主线程		for (int i = 1; i <= 50; i++) {			b.main(i);		}	}}class Bussiness {	PRivate boolean flag = true;	public synchronized void sub(int i) {		//如果不是自己 ，就等待		if (!flag) {			try {				this.wait();			} catch (InterruptedException e) {				e.printStackTrace();			}		}		for (int j = 1; j <= 10; j++) {			System.out.println("子线程循环" + j + "次,总循环" + i + "次");		}		flag = false;		this.notify();	}	public synchronized void main(int i) {		if (flag) {			try {				this.wait();			} catch (InterruptedException e) {				e.printStackTrace();			}		}		for (int j = 1; j <= 100; j++) {			System.out.println("主线程循环" + j + "次,总循环" + i + "次");		}		flag = true;		this.notify();	}}把主线程和子线程写在一个类中，体现了程序的高内聚。