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04/03/2019 04:27:22 PM

Cách sử dụng từ khóa super trong java

package inheritanceDemo;

import java.util.*;

class person{

            private int id;

            public String name;

            person(){

                        this.id = 0;

                        this.name ="";

            }

            person(int id, String name){

                        this.id = id;

                        this.name = name;

            }

            public void input() {

                        Scanner objSc =new Scanner(System.in);

                        System.out.print("Nhap id:");

                        id=objSc.nextInt();

                        objSc.nextLine();

                       

                        System.out.print("Nhap name:");

                        name=objSc.nextLine();

            }

            public void output() {

                        System.out.println("Id:"+this.id+" "+"Name:"+this.name);

            }

}

class employee extends person{

            public int empId;

            public float salary;

            employee(){

                        super();

                        this.empId =0;

                        this.salary=0;

            }

            public void input() {

                        super.input();

                        Scanner objSc =new Scanner(System.in);

                        System.out.print("Nhap empId:");

                        this.empId=objSc.nextInt();

                        objSc.nextLine();

                       

                        System.out.print("Nhap salary:");

                        this.salary = objSc.nextFloat();

            }

            public void output() {

                        super.output();

                        System.out.println("empId"+this.empId+"Salary:"+this.salary);

            }

}

public class demoInheritance {

            public static void main(String[] args) {

                        employee emp = new employee();

                        emp.input();

                        emp.output();

            }

}

Trương Đình Huy