從布爾方法返回字符串

Question

我有以下類圖。

我需要輸出一個類似於“James, Sid (1234): Director at £100000.0 (£29822.0 tax) and arequalified for bonus ”的 toString

但是，我無法找到打印出員工是否有資格獲得獎金的返回部分的方法。

任何幫助深表感謝！

這是我創建類的嘗試。

package org.com1027.formative.ye00036;

public class Employee {
    //Class Field(s)
    private int id = 0;
    private String forename = null;
    private String surname = null;
    private Salary salary = null;
    private CompanyPosition companyPosition = null;

    //Parameterised constructor using all fields, allowing creation of objects
    public Employee(int id, String forename, String surname, Salary salary, CompanyPosition companyPosition) {
        super();
        this.id = id;
        this.forename = forename;
        this.surname = surname;
        this.salary = salary;
        this.companyPosition = companyPosition;
    }

    //Getters-Accessors
    //Returns the employee's ID
    public int getId() {
        return id;
    }
    //Returns the employee's Forename
    public String getForename() {
        return forename;
    }
    //Returns the employee's Surname
    public String getSurname() {
        return surname;
    }
    //Returns the employee's Salary
    public Salary getSalary() {
        return salary;
    }
    //Returns the employee's Company Position
    public CompanyPosition getPositionName() {
        return companyPosition;
    }
    //Checks if an employee is eligible for bonus
    public boolean eligibleForBonus(){
        if (salary.getSalary() >= 40000) 
            return true;
        else 
            return false;
    }

    @Override
    public String toString() {
        return getForename() + ", " + getSurname() + "(" + getId() +
                "): " + getPositionName() + "at " + salary.getSalary() + " (" + salary.calculateTax() + ") and is ";
    }

}

Answer 1

您可以在此處使用三元運算符。

在你的toString方法中，聲明一個String類型的變量，並根據薪水是否大於40,000設置這個變量的值。 然后在返回的String末尾附加此變量的值。

這是你可以做到的方法

@Override
public String toString() {
    String val = (eligibleForBonus()) ? "eligible for bonus" : "not eligible for bonus";

    return getForename() + ", " + getSurname() + "(" + getId() +
                "): " + getPositionName() + "at " + salary.getSalary() + " (" + salary.calculateTax() + ") and is "+val;
    }

Answer 2

我建議只更改您的 toString 方法以具有符合條件的條件：

        return getForename() + ", " + getSurname() + "(" + getId() +
            "): " + getPositionName() + "at " + salary.getSalary() + " (" + salary.calculateTax() + ") and is "
            + (eligibleForBonus()? "eligible for a bonus" : "not eligible for a bonus");

您還可以在 toString 方法中使用更復雜的邏輯，它們不必立即返回：

    @Override
public String toString() {
    String returnString = getForename() + ", " + getSurname() + "(" + getId() +
            "): " + getPositionName() + "at " + salary.getSalary() + " (" + salary.calculateTax() + ") and is ";

    if(eligibleForBonus()){
        returnString += "eligible for bonus.";
    }else{
        returnString += "not eligible for bonus.";
    }

    return returnString;

}