24 lines
440 B
Java
24 lines
440 B
Java
package com.p14;
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public class BusCard {
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private float balance;
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public BusCard() {
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balance=0;
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}
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public float queryBalance() {
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return balance;
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}
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public void charge(float money) {
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balance=balance+money;
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}
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public void swipe(float money) throws CardException{
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if(balance<money) {
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CardException ex=new CardException("余额不足，无法刷卡，请尽快充值!");
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throw ex;
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}else {
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balance=balance-money;
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}
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}
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}
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