java interface implementation via object creation

interface object

interface onClickListener {
    public void onClick();
}

public class Practice {
    public static void main(String[] args) {
        onClickListener my_listener = new onClickListener() {
            @Override
            public void onClick() {
                System.out.println("this is a demo");
            }
        };
        
        my_listener.onClick();
    }
    
}