JButton.setBounds(x,y,w,h) doesn't seem to work

Question

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

public class SimpleExample extends JFrame {

    public SimpleExample() {
         


        

Answer 1

As a good practice, you should not add the button directly to the JFrame. Instead, add a JPanel to the frame, set the panel's layout to null, and add the JButton to the JPanel.

Answer 2

Your frame is under the control of a layout manager, it is making the decisions on how best to layout your components and is overriding the values you have specified using setBounds

Modern GUIs need to run (even on the same OS) in a variety of different graphical environments, including different DPI, screen sizes and font settings for example.

The layout manager makes it possible for you to worry (less) about these issues and it is highly recommended that you make use of them

Take a look at

• Using Layout Managers
• A Visual Guide to Layout Managers

For more details