Java Tutorial #30 - Interface in Java Programming (Examples)

Published: 25 June 2022
on channel: Programming For Beginners

713

Java Tutorial #30 - Interface in Java Programming
In this video by Programming for Beginners we will learn Interface in Java Programming, using Java Tutorial videos.

An interface is a fully abstract class. It includes a group of abstract methods (methods without a body).

Like abstract classes, we cannot create objects of interfaces.
To use an interface, other classes must implement it. We use the implements keyword to implement an interface.

Example:
interface Polygon {
void getArea(int length, int breadth);
}

// implement the Polygon interface
class Rectangle implements Polygon {

// implementation of abstract method
public void getArea(int length, int breadth) {
System.out.println("The area of the rectangle is " + (length * breadth));
}
}

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https://www.oracle.com/java/technolog...
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https://www.eclipse.org/downloads/

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