java - 第一次使用JAVA中的方法和构造函数，在程序中收到错误以确定引发

Question

我正在编写一个相当简单的程序，它只输出 2 名员工的姓名、他们的薪水以及该薪水 10% 的加薪。我有 2 个问题:1)工资打印为“$0.000000”2)我无法使加薪方法正常工作

这是我的代码:

public class Employee {

    // instance variable
    private String name;
    private  String lastName;
    private  double salary;

    // setters
    public  String getLastName() { return lastName; }
    public  String getName() { return name; }
    public  double getSalary() { return salary; }

    public  void raise(double raise) { salary = salary + (salary * .1); }

    // getters
    public  Employee(String name, String lastName, double salary) {
        this.name = name;
        this.lastName = lastName;

        if (salary > 0.0) {
          this.salary = salary;
        }
    }
} 

public class EmployeeTest {

    public  static void main(String[] args) {

        Employee raise1 = new Employee("Betty", "Jones", 4000.0);
        Employee raise2 = new Employee("Sally", "Mae", 6000.0);

        // Print statements for the employee's name and salary
        System.out.printf("Employee #1\nFirst Name: %s\nLast Name: %s\n\n" + "Salary: $%f", raise1.getName(), raise1.getLastName(), raise1.getSalary());

        // THIS IS WHERE I'M HAVNG TROUBLE
        System.out.printf("Her raise will be: %d", raise1.raise(salary));

        System.out.printf("Employee #1\nFirst Name: %s\nLast Name: %s\n\n" + "Salary: %f", raise1.getName(), raise1.getLastName(), raise1.getSalary());

        raise2.raise(salary);
    }
}

预先感谢您的帮助!

Answer 1

工资打印 $0.00000 的原因是因为您出于某种原因放置了 if 语句，而不是仅仅设置传递给构造函数的工资。第二件事， void 方法不会返回任何内容，这就是 raise 方法没有按照您想要的方式工作的原因。我已为您修复了该问题，请看一下，希望我能帮助您了解哪里出了问题，如果您有任何问题，请随时询问，我随时为您服务。

员工测试类:

public class EmployeeTest {

    public static void main(String[] args) {

        Employee raise1= new Employee("Betty","Jones",4000.0);
        Employee raise2= new Employee("Sally","Mae",6000.0);

        //Print statements for the employee's name and salary
        System.out.printf("Employee #1\nFirst Name: %s\nLast Name: %s\n\n" +
                "Salary: $%.2f",
                raise1.getName(),
                raise1.getLastName(),
                raise1.getSalary());

        System.out.printf("\nHer raise will be: $%.2f",
                raise1.raise(raise1.getSalary()));


        System.out.printf("\n\nEmployee #2\nFirst Name: %s\nLast Name: %s\n\n" +
                "Salary: $%.2f",
                raise2.getName(),
                raise2.getLastName(),
                raise2.getSalary());

        System.out.printf("\nHer raise will be: $%.2f\n",
                raise2.raise(raise2.getSalary()));

    }
}

员工类别:

public class Employee {

   //instance variable
   private String name;
   private String lastName;
   private double salary;

    //getters
    public String getLastName() {
        return lastName;
    }
    public String getName() {
        return name;
    }
    public double getSalary() {
        return salary;
    }

    public double raise(double raise){
        salary = salary + (salary*.1);
        return salary;
    }

    //constructor
    public Employee(String name, String lastName, double salary){

        this.name = name;
        this.lastName = lastName;
        this.salary = salary;

    }

}

打印上面程序的输出:

员工#1

名字:贝蒂

姓氏:琼斯

薪资:$4000.00

她的加薪金额为:4400.00 美元

员工#2

名字:莎莉

姓氏:梅

薪资:$6000.00

她的加薪将是:$6600.00