Initial commit

实验报告模板/实验报告6/p14/BusCard.java

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