FileDocCategorySizeDatePackage
SimpleExample.javaAPI DocExample4924Sat Sep 12 03:01:00 BST 1998None

SimpleExample

public class SimpleExample extends JPanel
An application that displays a JButton and several JRadioButtons. The JRadioButtons determine the look and feel used by the application.

Fields Summary
static JFrame
frame
static String
metal
static String
metalClassName
static String
motif
static String
motifClassName
static String
windows
static String
windowsClassName
JRadioButton
metalButton
JRadioButton
motifButton
JRadioButton
windowsButton
Constructors Summary
public SimpleExample()


      
	// Create the buttons.
	JButton button = new JButton("Hello, world");
        button.setMnemonic('h"); //for looks only; button does nada

	metalButton = new JRadioButton(metal);
        metalButton.setMnemonic('o"); 
	metalButton.setActionCommand(metalClassName);

	motifButton = new JRadioButton(motif);
        motifButton.setMnemonic('m"); 
	motifButton.setActionCommand(motifClassName);

	windowsButton = new JRadioButton(windows);
        windowsButton.setMnemonic('w"); 
	windowsButton.setActionCommand(windowsClassName);

	// Group the radio buttons.
	ButtonGroup group = new ButtonGroup();
	group.add(metalButton);
	group.add(motifButton);
	group.add(windowsButton);

        // Register a listener for the radio buttons.
	RadioListener myListener = new RadioListener();
	metalButton.addActionListener(myListener);
	motifButton.addActionListener(myListener);
	windowsButton.addActionListener(myListener);

	add(button);
	add(metalButton);
	add(motifButton);
	add(windowsButton);
    
Methods Summary
public static voidmain(java.lang.String[] s)

	/* 
	   NOTE: By default, the look and feel will be set to the
	   Cross Platform Look and Feel (which is currently Metal).
	   The user may someday be able to override the default
	   via a system property. If you as the developer want to
	   be sure that a particular L&F is set, you can do so
	   by calling UIManager.setLookAndFeel(). For example, the
	   first code snippet below forcibly sets the UI to be the
	   System Look and Feel. The second code snippet forcibly
	   sets the look and feel to the Cross Platform L&F.

	   Snippet 1:
	      try {
	          UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
	      } catch (Exception exc) {
	          System.err.println("Error loading L&F: " + exc);
	      }

	   Snippet 2:
	      try {
	          UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
	      } catch (Exception exc) {
	          System.err.println("Error loading L&F: " + exc);
              }
	*/

	SimpleExample panel = new SimpleExample();
	
	frame = new JFrame("SimpleExample");
	frame.addWindowListener(new WindowAdapter() {
	    public void windowClosing(WindowEvent e) {System.exit(0);}
	});
	frame.getContentPane().add("Center", panel);
	frame.pack();
	frame.setVisible(true);
	
	panel.updateState();
    
public voidupdateState()

	 String lnfName = UIManager.getLookAndFeel().getClass().getName();
	 if (lnfName.indexOf(metal) >= 0) {
	     metalButton.setSelected(true);
	 } else if (lnfName.indexOf(windows) >= 0) {
	     windowsButton.setSelected(true);
	 } else if (lnfName.indexOf(motif) >= 0) {
	     motifButton.setSelected(true);
	 } else {
	     System.err.println("SimpleExample if using an unknown L&F: " + lnfName);
	 }