Tag Archives: inheritance
Inheritance, IS-A and Has-A
Contents : IS-A relationship in OOP (Inheritance) Has-A relationship (Association) Different type of Association : Aggregation and Composition Example of each type SCJP exam objective 5.5
Unit 2 (Prog 6) : Inheritance in JAVA
Content : What is Inheritance ? Example of Inheritance. Reason to use Inheritance. What you can do in child class ?
Unit 2 (Prog 5) : Constructors in java
Constructor Demo code… /* * 1. Constructor can use any return type. * 2. Constructor name must match the name of class. * 3. constructor must not have a return type. * 4. If you see a method with return type having same name as class than it is just a method. * 5. if… Read More »
Unit 2 (Prog 4) : Test Overloading and Overriding
Overloading v/s Overriding methods… class Operator { public int operation(int x, int y) { System.out.println(“First method invoked from parent class.”); return x + y; }… Read More »
Unit 2 (Prog 2) : Accessing Super Class method
Accessing Super Class method : class ParentShape { public void displayShape(Object o) { System.out.println(“displaying parent shape from ” + o.toString() ); } // more code } class ChildOne extends ParentShape { … Read More »
Unit 2 (Prog 1) : Test Inheritance of class in JAVA
Inheritance Test for OCJP preparation… /* * equals() method is defined under * java.lang.Object class which is inherited by all class having main method * * thus every class is instance of java.lang.Object class * Whenever you create a class, you automatically inherit all of class Object’s methods. */ public class ch21TestClassInheritance { … Read More »