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CAVITE STATE UNIVERSITY
T3 CAMPUS
Department of Information Technology COSC 65 – Programming Languages

interface Drawing { // interface declaration: by first user
void draw();
}
class Rectanlge implements Drawing { // implementation: by second user
public void draw() {
System.out.println(“drawing rectangle…”);
}
}
class Circle implements Drawing {
public void draw() {
System.out.println(“drawing circle…”);
}
}
public class TestInterface2 {

public static void main(String[]args) {

Drawing sample = new Circle();
sample.draw();
}
}

Multiple Inheritance in Java by Interface
If a class implements multiple interfaces, or an interface extends multiple interfaces, it
is known as multiple inheritance.

Interface Interface Interface Interface
implements extends
Multiple Inheritance in Java
Class Interface

interface Printable {
void print();
}
interface Showable {
void show();
}

class A4 implements Printable, Showable {
public void print() {
System.out.println(“Hello”);
}
public void print() {
System.out.println(“Welcome”);
}
}
public class TestInterface3 {
public static void main(String[]args) {
A4 obj = new A4();
obj.print();
obj.show();
} }

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