Initial commit

实验报告模板/实验报告6/p14/BusCard.java

@@ -0,0 +1,23 @@
+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;
+		}
+	}
+
+}

实验报告模板/实验报告6/p14/CardException.java

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+package com.p14;
+
+public class CardException extends Exception{
+	private String message;
+	public CardException(String message) {
+		this.message=message;
+	}
+	public String getMessage() {
+		return message;
+	}
+	@Override
+	public String toString() {
+		return message;
+	}
+	
+
+}

实验报告模板/实验报告6/p14/Test.java

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+package com.p14;
+
+public class Test {
+
+	public static void main(String[] args) {
+		//开卡
+		BusCard card=new BusCard();
+		//充值
+		card.charge(2);
+		//查询余额
+		System.out.println("余额:"+card.queryBalance());
+		
+		//刷卡
+		try {
+			card.swipe(5);
+			System.out.println("刷卡成功！您的余额:"+card.queryBalance());
+		} catch (CardException e) {
+			System.out.println(e.getMessage());
+		}
+	}
+
+}