class201.java

模拟201卡电话机程序

//201卡类
public class class201 {
	public  int accounts;     //201卡卡号
	public  static int nextAccounts;//下一张卡的卡号，卡号生产是按顺序的	
    public int password;     //密码
	public double balance;   //余额
	
	static{       
		nextAccounts=11019081;   //第一张卡的卡号
	}
	
	class201(){
		accounts=nextAccounts++;
		balance=30.0;         
		password=123456;       
	}
	
	public void changePassword(String str){        //修改密码
			password=Integer.parseInt(str);
	}
	
	public double demandBalance(){                  //查询余额
		return balance;
	}
	
	public boolean calling(){            //每一分钟调用一次，每分钟0.3元
		if(balance>=0.3){                //余额小于0.3元的时候停止通话
			balance-=0.3;
			return true;
		}
		else
		    return false;
	}
}