两个线程，一个对一个变量加100次一个对一个变量减50次

àì夳堔傛蜴生んèń 2021-09-19 15:00 236阅读 0赞

# 实现方式1 #

package com.javabase;
    
    public class Test3 {
    	static int a=1;
    	public static void main(String[] args) {
    		Thread t1=new Thread(new Runnable(){
    
    			@Override
    			public void run() {
    				// TODO Auto-generated method stub
    				for(int i=0;i<100;i++){
    					a++;
    					System.out.println(Thread.currentThread().getName()+"--"+a);
    				}
    			}
    			
    		});
    		
    		
    		
    		Thread t2=new Thread(new Runnable(){
    
    			@Override
    			public void run() {
    				// TODO Auto-generated method stub
    				for(int i=0;i<50;i++){
    					a--;
    					System.out.println(Thread.currentThread().getName()+"--"+a);
    				}
    			}
    			
    		});
    		t1.start();
    		t2.start();
    	}
    }

# 实现方式2 需要四个类 #

User

package com.javabase;
    
    public class User {
       public int age;
       
    }

TestThread1

package com.javabase;
    
    public class TestThread1 implements Runnable {
    	User a;
    	public TestThread1(User b){
    		this.a=b;
    	}
    	@Override
    	public void run() {
    		// TODO Auto-generated method stub
    		
    		for(int i=0;i<100;i++){
    			this.a.age++;
    			System.out.println(Thread.currentThread().getName()+"--"+this.a.age);
    		}
    	}
    
    }

TestThread2

package com.javabase;
    
    public class TestThread2 implements Runnable {
    	User a;
    	public TestThread2(User b){
    		this.a=b;
    	}
    	@Override
    	public void run() {
    		// TODO Auto-generated method stub
    		
    		for(int i=0;i<50;i++){
    			this.a.age--;
    			System.out.println(Thread.currentThread().getName()+"--"+this.a.age);
    		}
    	}
    
    }

# 测试 Test1 #

package com.javabase;
    
    public class Test1 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    		User u=new User();
    		u.age=1;
    		TestThread1 t1=new TestThread1(u);
    		TestThread2 t2=new TestThread2(u);
    		Thread tt1=new Thread(t1);
    		tt1.setName("t1");
    		Thread tt2=new Thread(t2);
    		tt2.setName("t2");
    		tt1.start();
    		tt2.start();
    	}
    
    }