第四周作业：多线程

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().sleep((int) (Math.random()*300));
bs.despoit(1000);
}
}
catch(InterruptedException e){}
}
else{
try{
for(int i=0;i<6;i++){
Thread.currentThread().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().sleep(500);
}
}

第一次运行结果：

第二次运行结果：