多线程-线程一打印1,2,3,4,5线程二打印6,7,8,9,10,线程三打印11,12,13,14,15,...直到45结束

Posted 2021-12-14 wjqbooks

多线程-线程一打印1,2,3,4,5线程二打印6,7,8,9,10,线程三打印11,12,13,14,15,...知道45结束

 

public class Exam3
public static void main(String[]args)
MyThread t1=new MyThread("线程一");

 

MyThread t2=new MyThread("线程二");

 

MyThread t3=new MyThread("线程三");
t1.start();
t2.start();
t3.start();

 

 

class MyThread extends Thread
static int num=1;
static Object key="key";

public MyThread(String name)
super(name);

public void run()
while(true)
synchronized (key)
if(num<=45)
for (int i = 0; i < 5; i++)
System.out.println(getName()+":"+ num++);

else
break;

try
Thread.sleep(1000);
catch (InterruptedException e)
// TODO Auto-generated catch block
e.printStackTrace();

 

ps:线程执行顺序可能不一样，线程的执行机会是cpu随机分配

控制台

线程一:1
线程一:2
线程一:3
线程一:4
线程一:5
线程三:6
线程三:7
线程三:8
线程三:9
线程三:10
线程二:11
线程二:12
线程二:13
线程二:14
线程二:15
线程一:16
线程一:17
线程一:18
线程一:19
线程一:20
线程二:21
线程二:22
线程二:23
线程二:24
线程二:25
线程三:26
线程三:27
线程三:28
线程三:29
线程三:30
线程二:31
线程二:32
线程二:33
线程二:34
线程二:35
线程三:36
线程三:37
线程三:38
线程三:39
线程三:40
线程一:41
线程一:42
线程一:43
线程一:44
线程一:45

2019-05-31-22:46:44