线程学习的几个实例

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<no.length;i++){
            if(!(no[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
        }
    }
}