请使用代码描述:
        每一张借记卡(DebitCard)都有账号(accountNumber):和余额(money); 余额永远不能为负数
        要求:当借记卡的余额为负数的时候需要抛出自定的异常

[Java] 纯文本查看 复制代码

//余额为负数的异常

public class UnlawfulMoneyException extends RuntimeException{
	
	public UnlawfulMoneyException() {
		// TODO Auto-generated constructor stub
	}
	
	public UnlawfulMoneyException(String message) {
		super("余额不能为负数");
	}
}

//借记卡类

public class DebitCard {

	// 账号
	private String accountNumber;
	// 余额
	private double money;

	public DebitCard() {
		// TODO Auto-generated constructor stub
	}

	public DebitCard(String accountNumber, double money) {
		super();

		if (money < 0)
			throw new UnlawfulMoneyException("余额不能为负数");

		this.accountNumber = accountNumber;
		this.money = money;
	}

	// get/set
	public String getAccountNumber() {
		return accountNumber;
	}

	public void setAccountNumber(String accountNumber) {
		this.accountNumber = accountNumber;
	}

	public double getMoney() {
		return money;
	}

	public void setMoney(double money) {

		if (money < 0)
			throw new UnlawfulMoneyException("余额不能为负数");

		this.money = money;
	}
}

/*请使用代码描述: 
	每一张借记卡(DebitCard)都有账号(accountNumber):和余额(money); 余额永远不能为负数
	要求:当借记卡的余额为负数的时候需要抛出自定的异常*/

public class Test {
	public static void main(String[] args) {
		// DebitCard card = new DebitCard("1001", -1);
		
		DebitCard card = new DebitCard("1001", 1);
		
		System.out.println(card.getMoney());
	}
}

请使用代码描述:
        每一张借记卡(DebitCard)都有账号(accountNumber):和余额(money); 余额永远不能为负数
        要求:当借记卡的余额为负数的时候需要抛出自定的异常

[Java] 纯文本查看 复制代码

//余额为负数的异常

public class UnlawfulMoneyException extends RuntimeException{
	
	public UnlawfulMoneyException() {
		// TODO Auto-generated constructor stub
	}
	
	public UnlawfulMoneyException(String message) {
		super("余额不能为负数");
	}
}

//借记卡类

public class DebitCard {

	// 账号
	private String accountNumber;
	// 余额
	private double money;

	public DebitCard() {
		// TODO Auto-generated constructor stub
	}

	public DebitCard(String accountNumber, double money) {
		super();

		if (money < 0)
			throw new UnlawfulMoneyException("余额不能为负数");

		this.accountNumber = accountNumber;
		this.money = money;
	}

	// get/set
	public String getAccountNumber() {
		return accountNumber;
	}

	public void setAccountNumber(String accountNumber) {
		this.accountNumber = accountNumber;
	}

	public double getMoney() {
		return money;
	}

	public void setMoney(double money) {

		if (money < 0)
			throw new UnlawfulMoneyException("余额不能为负数");

		this.money = money;
	}
}

/*请使用代码描述: 
	每一张借记卡(DebitCard)都有账号(accountNumber):和余额(money); 余额永远不能为负数
	要求:当借记卡的余额为负数的时候需要抛出自定的异常*/

public class Test {
	public static void main(String[] args) {
		// DebitCard card = new DebitCard("1001", -1);
		
		DebitCard card = new DebitCard("1001", 1);
		
		System.out.println(card.getMoney());
	}
}