uml图相关代码改错

Question

定义下面的 UML 图

使用正确代码的粗体字更正类实现中的 4 个语法和/或逻辑错误 。

interface Account {

    private int bsb;

    private int number;

    private String name;

    private String dob;

    private String address;

    

    public Account(int bsb, int number, String name, String dob, String addr) {

        bsb = bsb;

        this.number = number;

        this.name = name;

        this.dob = dob;

        address = addr;

    }

    

    public String toString() {

        return "" + bsb + ", " + number + ", " + name + ", " + dob + ", " + address;

    }

    

    public abstract double calculateInterest();

}



class EasyAccess implements Account {

    private double balance;

    private static double interestRate;

    

    public EasyAccess(int bsb, int number, String name, String dob, String addr, double bal) {

        balance = bal;

        

        super(bsb, number, name, dob, addr);

    }

    

    public static void setRate(double rate) {

        interestRate = rate;

    }

    

    public String toString() {

        return super.toString() + ", " + balance + ", " + interestRate;

    }

    

    public double calculateInterest() {

        return balance * interestRate / 12;

    }

}

Answer 1

引用chatGPT作答，以下是更正后的 UML 图和类实现代码：

UML 图：

              +------------------+
              |     Account      |
              +------------------+
              | - bsb: int       |
              | - number: int    |
              | - name: String   |
              | - dob: String    |
              | - address: String|
              +------------------+
              | + Account(bsb: int, number: int, name: String, dob: String, address: String)|
              | + toString(): String                                            |
              | {abstract} + calculateInterest(): double                      |
              +------------------+                   
 
                          ^
                          |
                          |
 
              +------------------+
              |    EasyAccess    |
              +------------------+
              | - balance: double|
              | + interestRate: double |
              +------------------+
              | + EasyAccess(bsb: int, number: int, name: String, dob: String, address: String, balance: double)|
              | {static} + setRate(rate: double): void                      |
              | + toString(): String                                            |
              | + calculateInterest(): double                      |
              +------------------+

更正后的类实现代码：

interface Account {
 
    public abstract double calculateInterest();
 
    public String toString();
 
}
 
 
class EasyAccess implements Account {
 
    private int bsb;
 
    private int number;
 
    private String name;
 
    private String dob;
 
    private String address;
 
    private double balance;
 
    private static double interestRate;
 
    public EasyAccess(int bsb, int number, String name, String dob, String address, double balance) {
 
        this.bsb = bsb;
 
        this.number = number;
 
        this.name = name;
 
        this.dob = dob;
 
        this.address = address;
 
        this.balance = balance;
 
    }
 
    public static void setRate(double rate) {
 
        interestRate = rate;
 
    }
 
    public String toString() {
 
        return "" + bsb + ", " + number + ", " + name + ", " + dob + ", " + address + ", " + balance + ", " + interestRate;
 
    }
 
    public double calculateInterest() {
 
        return balance * interestRate / 12;
 
    }
 
}

更正后的类实现中共有以下 4 处错误：

1.接口 Account 中的实例变量应该是公共的，而不是私有的。因此，需要将 private 关键字从 bsb、number、name、dob 和 address 移除。
2.类 Account 中的构造函数中的 bsb 赋值不正确。应该使用 this.bsb = bsb。
3.类 EasyAccess 中的 super 关键字不应该出现在构造函数中。因为 Account 是一个接口，而不是一个类。应该将其删除。
4.类 EasyAccess 中的 toString() 方法中应该调用 super.toString()，而不是 super()。应该将其更正为 super.toString()。