线程之间通讯

Posted 2020-11-16 moris5013

/**
 *将线程要运行的逻辑代码及数据同步相关的锁，放在同一个类中，这里是Business类，数据同步由Business类维护
 *而与线程控制相关的代码分开，指的是线程类本身
 *
 */
public class CommunicationTest {

    public static void main(String[] args) {

        Business business = new Business();

        new Thread(new Runnable() {

            @Override
            public void run() {
                for (int i = 1; i <= 50; i++) {
                    business.main(i);
                }
            }
        }).start();

        new Thread(new Runnable() {

            @Override
            public void run() {
                for (int i = 1; i <= 50; i++) {
                    business.sub(i);
                }
            }
        }).start();

    }

}

class Business {
    
    private boolean isShouldSub = false;

    public synchronized void sub(int i) {
        while (!isShouldSub) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        for (int j = 1; j <= 10; j++) {
            System.out.println("sub thread sequence of  " + j + " , loop of " + i);
        }
        isShouldSub = false;
        this.notify();
    }

    public synchronized void main(int i) {
        while (isShouldSub) {
            try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        for (int j = 1; j <= 30; j++) {
            System.out.println("main thread sequence of  " + j + " , loop of " + i);
        }
        isShouldSub = true;
        this.notify();
    }
}