import java.util.*;

public class Syncduixiang implements Runnable{
    int b=1000;
    public static void main(String []args) throws Exception{
        Syncduixiang ss=new Syncduixiang();
        Thread s1=new Thread(ss);
        System.out.println(new Date());
        
        s1.start();
        
        ss.m2();
        System.out.println("b="+ss.b+new Date());
    }
    public void run(){
        try{
            m1();
        }catch(Exception e){
            
        }
    }
    public synchronized void m1 ()throws Exception{
        System.out.println("m1先执行");
        int a=3000;
        Thread.sleep(5000);
        System.out.println("m1a="+a+new Date());
    }
    public synchronized void m2 ()throws Exception{
        System.out.println("m2先执行");
        b=4000;
        Thread.sleep(2000);
        System.out.println("m2b="+b+new Date());
    }
    
}

import java.util.*;

public class Syncduixiang extends Thread{
    int b=1000;
     Ff f1=new Ff();
    public static void main(String []args) throws Exception{
        Syncduixiang ss=new Syncduixiang();
      
        System.out.println(new Date());
        
        ss.start();
       
        ss.f1.m2();
        System.out.println("b="+ss.b+new Date());
    }
    public void run(){
        try{
         
            f1.m1();
        }catch(Exception e){
            
        }
    }
    
    
}

class Ff{
    public synchronized void m1 ()throws Exception{
        System.out.println("m1先执行");
        int a=3000;
        Thread.sleep(3000);
        System.out.println("m1a="+a+new Date());
    }
    public synchronized void m2 ()throws Exception{
        System.out.println("m2先执行");
        Syncduixiang q=new Syncduixiang();
        q.b=4000;
        Thread.sleep(2000);
        System.out.println("m2b="+q.b+new Date());
    }
}