java - Java调用继承的方法只使用一个对象

Question

如何仅使用任何一个类的对象调用 2 个类（继承）的方法。
考虑代码

class Employee
{
    void display()
    {
        System.out.println("Name of class is Employee");
    }

    void calcSalary()
    {
        System.out.println("Salary of employee is 10000");
    }
}

class Engineer extends Employee
{
    void display()
    {
        System.out.println("Name of class is Engineer");
    }
    void calcSalary()
    {
        System.out.println("Salary of engineer is 20000");
    }
}

如果我将一个对象声明为

Employee ob = new Employee();
ob.display();  //prints "Name of class is Employee"
ob.calcSalary(); //prints "Salary of employee is 10000"

相似地

Engineer ob = new Engineer();
ob.display();  //prints "Name of class is Engineer"
ob.calcSalary();  //prints "Salary of engineer is 20000"

如何仅使用单个实例（任一类）获得所有这 4 个输出？

标签： java

Answer 1

通过添加super.display()inhereted 方法的第一行，您可以调用父类的方法。