Frame with Null Layout- set layout NULL

import java.awt.*;

public class FrameWithNullLayout extends Frame {
    private boolean isApplet = true;
    private boolean laidOut = false;
    private Button btnOne, btnTwo, btnThree;

    public FrameWithNullLayout() {
        super();
        setLayout(null);
        setFont(new Font("Arial", Font.PLAIN, 15));

        btnOne = new Button("Btn1");
        add(btnOne);
        btnTwo = new Button("Btn2");
        add(btnTwo);
        btnThree = new Button("Btn3");
        add(btnThree);
    }

    public void paint(Graphics g) {
        if (!laidOut) {
            Insets insetObj = insets();
          
            btnOne.reshape(60 + insetObj.left, 6 + insetObj.top, 55, 25);
            btnTwo.reshape(70 + insetObj.left, 36 + insetObj.top, 55, 25);
            btnThree.reshape(140 + insetObj.left, 16 + insetObj.top, 55, 35);

            laidOut = true;
        }
    }

    public boolean handleEvent(Event e) {
        if (e.id == Event.WINDOW_DESTROY) {
            if (isApplet) {
                dispose();
                return false;
            } else {
                System.exit(0);
            }
        }   
        return super.handleEvent(e);
    }

    public static void main(String args[]) {
        FrameWithNullLayout window = new FrameWithNullLayout();
        Insets insetObj = window.insets();
        //How do we know insetObj is valid here?
        window.isApplet = false;

        window.setTitle("FrameWithNullLayout Demo");
        window.resize(250 + insetObj.left + insetObj.right,
                      90 + insetObj.top + insetObj.bottom);
        window.show();
    }
}