线程同步

                       //继承Thread
public class MyHread1 extends Thread {
    public Print p1;
    
    @Override
    public void run() {
        //循环打印print1中的内容
        for (int i = 1; i <= 5; i++) {
            p1.print1();
            
        }
        
        
        
        
    }


}

public class MyThread2 implements Runnable{
public Print p1;
    @Override
    public void run() {
          //循环输出print2中的内容
        for (int i = 1; i <= 5; i++) {
            p1.print2();
            
        }
    }

}

定义两个类  一个继承Thread 另一个实现Runable  循环输出内容  分别在void前加上锁synchronized

public class Print {


    public synchronized void print1(){
        
        System.out.print("我");
        System.out.print("是");
        
        System.out.println();
    }
    
    public synchronized void print2(){
        
        System.out.print("好");
        System.out.print("人");
        System.out.println();
        
    }

}

定义一个print类  类中有两个方法 分别输出内容  并且内容之间不换行  直至全部结束再换行

public class Test {
    
    public static void main(String[] args) {
        MyHread1 mh=new MyHread1();
        Print p=new Print();
        mh.p1=p;
        
        mh.start();
        
        
        MyThread2 mh2=new MyThread2();
        
        mh2.p1=p;
        Thread th=new Thread(mh2);
        
        th.start();
        
    }

}