Thread 同步线程（打印机同步）

程序员天震技术 2022年11月23日

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1、首先创建一个打印机对象

package cn.b.happy;public class Printer {
Object o =new Object();
public void print(){
synchronized(o){
System.out.print("微");
System.out.print("冷");
System.out.print("的");
System.out.print("雨");
System.out.println();
}
}public void print1(){
synchronized(o){
System.out.print("好");
System.out.print("人");
System.out.println();
}}}

2、创建两个线程分别为thread1 和 thread2 分别继承thread 和是实现 runnable接口包含打印机 printer 对象

package cn.b.happy;public class MyThread1 extends Thread{    public Printer print;
    @Override
    public void run() {
        for (int i = 1; i <=500; i++) {
            print.print();
        }
    }
}

package cn.b.happy;public class MyThread2 implements Runnable {
    public Printer print;
    @Override
    public void run() {
        for (int i = 1; i <=500; i++) {
            print.print1();
        }    }}

3、测试类实现runnable 接口的线程不能调用start()方法，所以创建一个Thread线程对象里边传实现runnable接口的类，从而实现开启线程

package cn.b.happy;public class Test {
    public static void main(String[] args) {
        Printer p =new Printer();
        MyThread1 t1 =new MyThread1();
        t1.print=p;
        t1.start();        MyThread2 t2 =new MyThread2();
        t2.print=p;
        Thread t=new Thread(t2);
        t.start();
    }}