Here’s a problem: final Timer timer = new Timer(); timer.scheduleAtFixedRate(new TimerTask() { Don’t use a java.util.Timer in a Swing program as you will have threading problems. Instead use a Swing Timer. Also, you’re making Swing calls in background threads and using Graphics object obtained by calling getGraphics() on a component, two no-nos for Swing programs. … Read more
The short answer is don’t. The reasons for this is you’ll end having to expose the parent container and CardLayout to ALL your sub components, which not only exposes portions of your application to potential mistreatment, it tightly couples the navigation making it difficult to add/remove steps in the future… A better solution would be … Read more
I had made a small program, hopefully the comments written in the program, might be able to guide you, to understand how to use CardLayout. import java.awt.*; import java.awt.event.*; import javax.swing.*; /* Here we are first declaring our class that will act as the * base for other panels or in other terms the base … Read more
Your use case, seems perfect for CardLayout. In card layout you can add multiple panels in the same place, but then show or hide, one panel at a time.
How to Use CardLayout With a new JFrame form, add a JPanel, a few JButtons to the form so it looks like this Your navigator pane should look like this. Notice I changed the variable names. You can do that by right clicking on the component from the navigator and selecting change variable name. Now … Read more
CardLayout works well for this, as suggested below. import java.awt.BorderLayout; import java.awt.CardLayout; import java.awt.Color; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.Random; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; /** @see http://stackoverflow.com/questions/6432170 */ public class CardPanel extends JPanel { private static final Random random = new Random(); private static final JPanel cards … Read more