// // Simple creation of a "Push Me" button which toggles foreground // color of button between magenta and black // import javax.swing.*; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; import java.awt.Color; public class PushMeButtonColor extends JPanel implements ActionListener{ private Color magenta = new Color(255, 0, 255); // use black initially private Color black = new Color(0, 0, 0); // use black initially private Color textcolor = black; private JButton PMButton; public PushMeButtonColor(){ // Create button labeled "push me" PMButton = new JButton ("Push Me"); PMButton.addActionListener(this); add(PMButton); } /** * Create the GUI and show it. For thread safety, * this method should be invoked from the * event-dispatching thread. */ private static void createAndShowGUI() { //Make sure we have nice window decorations. JFrame.setDefaultLookAndFeelDecorated(false); //Create and set up the window. JFrame frame = new JFrame("Button Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // set up content pane PushMeButtonColor newContentPane = new PushMeButtonColor(); newContentPane.setOpaque(true); newContentPane.setBorder( BorderFactory.createEmptyBorder(20,20,20,20)); //T,L,B,R frame.setContentPane(newContentPane); //Display the window. frame.pack(); frame.setVisible(true); } public void actionPerformed(ActionEvent e){ if (textcolor == black) textcolor = magenta; else textcolor = black; PMButton.setForeground(textcolor); } public static void main(String[] args) { //Schedule a job for the event-dispatching thread: //creating and showing this application's GUI. javax.swing.SwingUtilities.invokeLater(new Runnable() { public void run() { createAndShowGUI(); } }); } }