模拟多人售票的多线程测试

最新推荐文章于 2022-10-30 12:58:30 发布

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最新推荐文章于 2022-10-30 12:58:30 发布

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分类专栏： JAVA 文章标签：多线程 exception terminal string class null

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01class 
LockDemo{ 

02    public
static void 
main(String [] hello){ 

03        TestThread tt = TestThread.getInstance_robot();

04        new
Thread(tt).start(); //on work ,here comes a client saler A

05        try{Thread.sleep(10);}catch(Exception
 e){} 

06  

07        tt.lockname =
"Vip_clinet1"; 
//saler B was late for work,but  

08                     //later is better than never

09        new
Thread(tt).start(); 

10    } 

11} 

12  

13class 
TestThread implements 
Runnable{ 

14      

15    private
int how_many; //counter

16    private
static TestThread FC_instance =
null; 

17  

18    //singleton it~

19    private
TestThread(){ 

20        this.how_many =
0; 

21    } 

22  

23    public
static TestThread getInstance_robot(){

24    if(FC_instance ==
null) 

25        return
new TestThread(); 

26    return
FC_instance; 

27    } 

28  

29    String lockname =
"iamalock hahahaha~";

30    int
tickets = 1200;
//assume there is 1200  

31    //railway ticket waiting to get saled by

32    //2 operators in the station's terminal windows

33      

34    public
void run(){ 

35      

36    int
tickets_flag = this.tickets;

37      

38    if(lockname.equals("Vip_clinet1"))

39    { 

40        while(true){

41            if(tickets >
0 ){ 

42                    try{Thread.sleep(1);}/**VIP嘛
 当然要慢那么一点点了哦..*/catch(Exception e){}

43                    synchronized(lockname){};

44                    System.out.println("| "+this.lockname+"
 is saling ticket: "+tickets--+" | ");

45            }

46        }

47    }else
//anoymous robot saler -_-*) 

48    { 

49        while(true){//我要风了,,,还是处理不好CPU时间片儿的问题阿

50            synchronized(lockname){

51                if(tickets >
0){ 

52                    try{Thread.sleep(3);}catch(Exception
 e){} 

53                    synchronized(lockname){};

54                    System.out.println("\t\t\t\t\t | "+Thread.currentThread().toString()+"
 is saling tickets "+tickets--+" | ");

55    how_many++;

56                }else 

57                {

58                System.out.println(tickets_flag+"张票 全部受完\t打烊!");

59                System.out.println("报告长官：VIP售出"+(tickets_flag-how_many)+" 张票\n");

60                System.out.println("机器人员工售出："+how_many+"张票\n");

61              

62                //try{Thread.stop(this);}catch(Exception e){}

63                return;

64                }

65            }        

66        }

67    } 

68  

69    }//end function run()

70}