Method overriding:   A method in base class redefining in derived class   class user { String name; int age; user(String n,int a) { this.name=n; this.age=a; } public void display() { System.out.println(“Name=” +name); System.out.println(“Age=” +age); } } class Mainprogrammer extends User { String companyname; Mainprogrammer(String n,int a,String c) { super(n,a); this.companyname=c; } public void display() […]