Implementing Interface in Java: Explanation & Practice

Problem summary

Create a Drawable interface with draw() method, implemented by Square.

Starter code

// Create Drawable interface with:
// - void draw()

// Create Square implementing Drawable:
// - implement draw() to print "Drawing square"

public class Main {
    public static void main(String[] args) {
        // Create square and draw it
    }
}

Expected output and test cases

• Draw square

  Drawing square

Hints

1. Use 'implements' keyword
2. Interface methods are public abstract by default
3. Class must implement all interface methods

Related Inheritance exercises

• Practice Using Super Keyword in Java
• Practice Abstract Classes in Java
• Practice Polymorphism Demo in Java

Practice all Inheritance exercises · Run this idea in the Java compiler