t6_3_long.java

多个java程序

public class T6_3_long extends T5_3_Account {
private double uplimit;
	
	public T6_3_long(){
		uplimit=0;
	}
	
	
	//提款
	public void withdraw(double amount){
		if(amount<=balance+uplimit){
			balance=balance-amount;
			System.out.println("取款成功");
		}
		else{
			System.out.println("透支过多，操作无效");
		}
	}

}