Page 195 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

EXERCISE 114 : Extend interfaces in JAVA

Objectives

At the end of this exercise you shall be able to
• develop Java programs to extend interface in Java.

Requirements

Tools/Materials
• PC / laptop with windows OS
• SDK software
• Test editor (Visual studio/ subline/ notepad)

Procedure

TASK 1: Extending Interfaces

// Base interface
interface Shape {
void draw(); // Abstract method
}

// Extended interface inheriting from Shape
interface Colorable extends Shape {
void color(); // Additional abstract method
}

// Class implementing the extended interface
class Square implements Colorable {
@Override
public void draw() {
System.out.println(“Drawing a square”);

}

@Override
public void color() {

System.out.println(“Coloring the square”);
}
}

// Main class

public class InterfaceExtensionExample {

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