java-多线程-同步的优化

package test;

public class Test01{
    public static void main(String[] args) {
        Student s=new Student();
        
        SetThread st=new SetThread(s);
        GetThread gt=new GetThread(s);
        
        Thread t1=new Thread(st);
        Thread t2=new Thread(gt);
        
        t1.start();
        t2.start();
    }
}

package test;

public class Student {
     private String name;
     private int age;
     private boolean flag;  //默认是false;
     
     public synchronized void set(String name,int age){
        //如果有数据，等待
         if(this.flag){
             try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
         }
         //设置数据
         this.name=name;
         this.age=age;
         //修改标记
         this.flag=true;
         this.notify();
     }
     public synchronized void get(){
         if(!this.flag){
             try {
                this.wait();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
         }
         System.out.println(this.name+"---"+this.age);
         //修改标记
         this.flag=false;
         this.notify();
     }
}

package test;

public class SetThread implements Runnable {
    private Student s;
    private int x = 0;

    public SetThread(Student s) {
        this.s = s;
    }

    @Override
    public void run() {
        while (true) {
            if (x % 2 == 0) {
                s.set("hello", 22);
            } else {
                s.set("来了", 10);
            }
            x++;
        }

    }
}

package test;

public class GetThread implements Runnable {
    private Student s;

    public GetThread(Student s) {
        this.s = s;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        while (true) {
            s.get();
        }

    }
}