java类构造函数未正确初始化值

Question

我有一个主java文件和一个employee类。对于employee类，我有3个方法—返回employee name的getName方法、返回salary的getSalary方法和将salary提高一定百分比的raiseSalary

在我的Main.java文件中，我创建了一个构造函数来初始化employee类的值，当我尝试打印这些值时，得到null和0

/**
 * This class tests the Employee object.
 * 
 */
public class Main {
    /**
     * Create an employee and test that the proper name has been created. Test
     * the initial salary amount and then give the employee a raise. Then check
     * to make sure the salary matches the raised salary.
     * 

    public static void main(String[] args) {
        Employee harry = new Employee("Hi", 1000.00);
        System.out.println("Employee name:" + harry.getName());
        System.out.println("Salaray: "+ harry.getSalary());

        harry.raiseSalary(10); // Harry gets a 10% raise.
    }
}

/*** This class implements an employee which is a person with a name and a      salary.
* 
*/
public class Employee {

    private String employeeName;
    private double currentSalary;

    public Employee(String employeeName, double currentSalary) {

    }

    // Accessors that are obvious and have no side effects don't have to have
    // any documentation unless you are creating a library to be used by other
    // people.
    public String getName() {
        return employeeName;
    }

    public double getSalary() {
        return currentSalary;
    }

    /**
     * Raise the salary by the amount specified by the explicit argument.
     * 
     */
    public void raiseSalary(double byPercent) {
        currentSalary = getSalary() * byPercent;
    }
}

Answer 1

构造函数中的参数不指向在其作用域之外创建的相同对象。。。简单地修复

public Employee(String employeeName, double currentSalary) {
this.employeeName = employeeName;
this.currentSalary = currentSalary;

}

在变量名之前添加一个“this”，只需告诉代码指向作用域之外的变量