1.售票系统

public class DemoTest {    public static void main(String args[]){        ThreadTest mtTest= new ThreadTest();        new Thread(mtTest).start();        new Thread(mtTest).start();        new Thread(mtTest).start();    }        public boolean isNumber(String str){        char[] no=str.toCharArray();        for(int i=0;i
     
      ='0' && no[i]<='9')){                return false;            }        }        return true;    }}class ThreadTest implements Runnable{    int tickets=100;    @Override    public void run() {        // TODO Auto-generated method stub        while(true){            saleTicket();        }    }        public synchronized void saleTicket(){        synchronized (this) {            if(tickets>0){                try {                    Thread.sleep(100);                    System.out.println(Thread.currentThread().getName()+"----"+"ticket"+"--->"+tickets--);                } catch (Exception e) {                    // TODO: handle exception                }            }        }    }}
     

 

2.存钱

public class ThreadTest_1 {    public static void main(String args[]){        ThreadDemo mtDemo=new ThreadDemo();        new Thread(mtDemo,"小明").start();  //两个人去存款，一共存了6次，共600元        new Thread(mtDemo,"小红").start();    }}class ThreadDemo implements Runnable{    int account=0;    @Override   //每个人存3次钱，一次存100    public void run() {        // TODO Auto-generated method stub        for(int i=0;i<10;i++){            saveMoney(100);        }    }            public synchronized void saveMoney(int money){        account = account+money;         try {            Thread.sleep(100);            System.out.println(Thread.currentThread().getName()+"存入100元后，现在账户余额为"+account);        } catch (InterruptedException e) {            // TODO: handle exception        }    }}

 

3.火车过山洞

public class ThreadTest_2 {    public static void main(String[] args) {        // TODO Auto-generated method stub        ThreadDemo_1 mtDemo=new ThreadDemo_1();        new Thread(mtDemo,"火车A").start();        new Thread(mtDemo,"火车B").start();        new Thread(mtDemo,"火车C").start();        new Thread(mtDemo,"火车D").start();        new Thread(mtDemo,"火车E").start();    }}class ThreadDemo_1 implements Runnable{    @Override    public void run() {                // TODO Auto-generated method stub            throughHill();    }        public synchronized void throughHill(){        try {            Thread.sleep(1000);            System.out.println("此时穿过山洞的火车是："+Thread.currentThread().getName());        } catch (InterruptedException e) {            // TODO: handle exception        }    }}