Java课后题——（账户Account的子类）在编程练习9.7中定义了一个Account类来建模一个银行账户。一个账户有账号、余额、年率率、开户日期等属性，以及存款和取款等方法

今天药忘吃喽~ 2022-02-02 10:43 166阅读 0赞

# （账户Account的子类）在编程练习9.7中定义了一个Account类来建模一个银行账户。一个账户有账号、余额、年率率、开户日期等属性，以及存款和取款等方法。创建两个检测支票账户（checkingAccount）和储蓄账户（SavingAccount）的子类。支票账户有一个透支限定额度，但储蓄账户不能透支。画出这些类的UML图并实现这些类。编写一个测试程序，创建Account、SAavngAccount和checkingAccount的对象，然后调用他们的toString（）方法。 #

\#本例题答案可能存在许多不足，若读者发现某些错误，还请评论指点

//Account类
    import java.util.Date;
    public class Account2 {
    
    	protected int id;
    	protected double balance;
    	protected double annualIntegerRate;
    	protected Date dateCreated;
    
    	protected Account2() {
    	}
    
    	protected Account2(int id,double balance) {
    		this.id = id;
    		this.balance = balance;
    		dateCreated = new Date();
    	}
    
    	protected Account2(int id,double balance,double annualIntegerRate) {
    		this(id,balance);
    		dateCreated = new Date();
    		this.annualIntegerRate = annualIntegerRate;
    	}
    
    	protected int getId() {
    		return id;
    	}
    
    
    	protected void setId(int id) {
    		this.id = id;
    	}
    
    	protected double getBalance() {
    		return balance;
    	}
    
    	protected void setBalance(double balance) {
    		this.balance = balance;
    	}
    
    	protected double getAnnualIntegerRate() {
    		return annualIntegerRate;
    	}
    
    	protected void setAnnualIntegerRate(double annualIntegerRate) {
    		this.annualIntegerRate = annualIntegerRate;			
    	}
    
    	protected void withDaraw(double withDarawBalance) {
    		if(balance - withDarawBalance>-50000) {
    			balance = balance - withDarawBalance;
    		}
    		
    		else {
    			System.out.println("透支额度不足！");
    		}
    		
    	}
    
    	protected void deposit(double depositBalance) {
    		balance = balance + depositBalance;
    	}
    
    	protected void setDateCreated(Date dateCreated) {
    		this.dateCreated = dateCreated;
    	}
    
    	protected Date getDateCreated() {
    		return dateCreated;
    	}
    
    	@Override
    	public String toString() {
    		return "Id Created is->"+getDateCreated()+"\nId->"+getId()+"\nBalance->"+getBalance()+"\nAnnualIntegerRate->"+getAnnualIntegerRate();
    	}
    }

//CheckingAccount类
    
    class CheckingAccount2 extends Account2{
    	
    	public CheckingAccount2() {
    		
    	}
    	
    	public CheckingAccount2(int id,double balance) {
    		super(id,balance);
    	}
    	
    	public CheckingAccount2(int id,double balance,double annualIntegerRate) {
    		super(id,balance,annualIntegerRate);
    	}
    		
    	@Override 
    	public String toString() {
    		return "Account typte：CheckingAccount\n"+super.toString();
    	}
    	
    }
    
    
    //SavingAccount类
    class SavingAccount2 extends Account2{
    
    	public SavingAccount2() {
    
    	}
    
    	public SavingAccount2(int id,double balance) {
    		super(id,balance);
    	}
    
    	public SavingAccount2(int id,double balance,double annualIntegerRate) {
    		super(id,balance,annualIntegerRate);
    	}
    	
    	@Override
    	protected void withDaraw(double withDarawBalance) {
    		if(balance-withDarawBalance<0) {
    			System.out.println("账户余额不足！余额为："+getBalance());
    		}
    		
    		else {
    			balance = balance - withDarawBalance;
    		}	
    	}
    
    	@Override 
    	public String toString() {
    		return "Account typte：SavingAccount\n"+super.toString();
    	}
    }

//测试类
    package javaxqg0_practice;
    
    public class Conbine1 {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		int id1 = 1122;
    		int id2 = 2211;
    		double balance = 10000;
    		double annoualIntegerRate = 0.0025;
    		
    		System.out.println("*****************************************CheckingAccount2*************************************\n");
    		CheckingAccount2 check1 = new CheckingAccount2();
    		CheckingAccount2 check2 = new CheckingAccount2(id1,balance);
    		CheckingAccount2 check3 = new CheckingAccount2(id2,balance,annoualIntegerRate);
    		
    		System.out.println("---------------------Check1---------------------\n");
    		System.out.println(check1.getDateCreated());
    		System.out.println(check1.getId());
    		System.out.println(check1.getBalance());
    		System.out.println(check1.getAnnualIntegerRate());
    		
    		double depositBalance = 1000;
    		check1.deposit(depositBalance);
    		System.out.println(check1.getBalance());
    		
    		double  withDarawBalance = 1000;
    		check1.withDaraw(withDarawBalance);
    		System.out.println(check1.getBalance());
    		System.out.println();
    		System.out.println(check1.toString());
    		
    		
    		System.out.println("---------------------Check2---------------------\n");
    		System.out.println(check2.getDateCreated());
    		System.out.println(check2.getId());
    		System.out.println(check2.getBalance());
    		System.out.println(check2.getAnnualIntegerRate());
    		
    		check2.deposit(depositBalance);
    		System.out.println(check2.getBalance());
    		
    		check2.withDaraw(withDarawBalance);
    		System.out.println(check2.getBalance());
    		System.out.println();
    		System.out.println(check2.toString());
    		
    		
    		System.out.println("---------------------Check3---------------------\n");
    		System.out.println(check3.getDateCreated());
    		System.out.println(check3.getId());
    		System.out.println(check3.getBalance());
    		System.out.println(check3.getAnnualIntegerRate());
    		
    		check3.deposit(depositBalance);
    		System.out.println(check2.getBalance());
    		
    		check3.withDaraw(withDarawBalance);
    		System.out.println(check3.getBalance());
    		System.out.println();
    		System.out.println(check3.toString());
    		
    		
    		System.out.println("---------------------Check3---------------------\n");
    		System.out.println(check3.getDateCreated());
    		System.out.println(check3.getId());
    		System.out.println(check3.getBalance());
    		System.out.println(check3.getAnnualIntegerRate());
    		
    		check3.deposit(depositBalance);
    		System.out.println(check2.getBalance());
    		
    		check3.withDaraw(200000);
    		System.out.println(check3.getBalance());
    		System.out.println();
    		System.out.println(check3.toString());
    		
    		
    		System.out.println("*****************************************SavingAccount2*************************************");
    		SavingAccount2 saving1 = new SavingAccount2();
    		SavingAccount2 saving2 = new SavingAccount2(id1,balance);
    		SavingAccount2 saving3 = new SavingAccount2(id2,balance,annoualIntegerRate);
    		
    		System.out.println("---------------------saving1---------------------\n");
    		System.out.println(saving1.getDateCreated());
    		System.out.println(saving1.getId());
    		System.out.println(saving1.getBalance());
    		System.out.println(saving1.getAnnualIntegerRate());
    		
    		saving1.deposit(depositBalance);
    		System.out.println(check1.getBalance());
    		
    		saving1.withDaraw(withDarawBalance);
    		System.out.println(saving1.getBalance());
    		System.out.println();
    		System.out.println(saving1.toString());
    		
    		System.out.println("---------------------saving2---------------------\n");
    		System.out.println(saving2.getDateCreated());
    		System.out.println(saving2.getId());
    		System.out.println(saving2.getBalance());
    		System.out.println(saving2.getAnnualIntegerRate());
    		
    		saving2.deposit(depositBalance);
    		System.out.println(check2.getBalance());
    		
    		saving2.withDaraw(withDarawBalance);
    		System.out.println(saving2.getBalance());
    		System.out.println();
    		System.out.println(saving2.toString());
    		
    		System.out.println("---------------------saving3---------------------\n");
    		System.out.println(saving3.getDateCreated());
    		System.out.println(saving3.getId());
    		System.out.println(saving3.getBalance());
    		System.out.println(saving3.getAnnualIntegerRate());
    		
    		saving3.deposit(depositBalance);
    		System.out.println(saving3.getBalance());
    		
    		saving3.withDaraw(withDarawBalance);
    		System.out.println(saving3.getBalance());
    		System.out.println();
    		System.out.println(saving3.toString());
    		
    		System.out.println("---------------------saving4---------------------\n");
    		System.out.println(saving1.getDateCreated());
    		System.out.println(saving1.getId());
    		System.out.println(saving1.getBalance());
    		System.out.println(saving1.getAnnualIntegerRate());
    		
    		saving1.deposit(depositBalance);
    		System.out.println(check1.getBalance());
    		
    		saving1.withDaraw(20000);
    		System.out.println(saving1.getBalance());
    		System.out.println();
    		System.out.println(saving1.toString());
    		
    	}
    
    }

《完》若有不足还请大家指教，谢谢！