第四周作业

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class BankAccount  

{  

    private static int amount=2000;  

    public void despoit(int m)  

    {  

        amount =amount + m;  

        System.out.println("小明存入["+m +"元]");  

    }  

    public void withdraw(int m)  

    {  

        amount =amount-m;  

        System.out.println("张新取走["+m +"元]");  

        if (amount <0)  

            System.out.println("***余额不足！***");  

    }  

    public int balance()  

    {  

        return amount;  

    }  

}  

class Customer extends Thread  

{  

    String name;  

    BankAccount bs;  

    public Customer(BankAccount b,String s)  

    {  

        name =s;  

        bs =b;  

    }  

    public synchronized static void cus (String name, BankAccount bs)  

    {  

        if(name.equals("小明"))  

        {  

            try  

            {  

                for(int i =0;i<6;i++)  

                {  

                    Thread.currentThread();  

                    Thread.sleep((int)(Math.random()*300));  

                    bs.despoit(1000);             

                }  

            }  

            catch(InterruptedException e)  

            {}  

        }  

        else  

        {  

            try  

            {  

                for(int i=0;i<6;i++)  

                {  

                    Thread.currentThread();  

                    Thread.sleep((int)(Math.random()*300));  

                    bs.withdraw(1000);  

                }  

            }  

            catch(InterruptedException e)  

            {}  

        }         

    }  

    public void run()  

    {  

        cus(name,bs);  

    }  

}  

public class AccountTest1  

{  

    public static void main(String args[])throws InterruptedException  

    {  

        BankAccount bs =new BankAccount();  

        Customer customer1=new Customer(bs,"小明");  

        Customer customer2=new Customer(bs,"张新");  

        Thread t1 =new Thread(customer1);  

        Thread t2 =new Thread(customer2);  

        t1.start();  

        t2.start();  

        Thread.currentThread();  

        Thread.sleep(500);  

    }  

}