Can you give an example of defining an interface in programming?

In programming, an interface defines a set of methods that a class must implement without specifying the actual implementation. In Android (Java/Kotlin), it is often used to create contracts between components.

Example of an interface in Java:

public interface ClickListener {
    void onClick(View view);
}

A class implementing this interface must define the onClick method:

public class ButtonHandler implements ClickListener {
    @Override
    public void onClick(View view) {
        // Reaction to button press
    }
}