Optionsknopf Java Swing
//In initialization code:
ImageIcon leftButtonIcon = createImageIcon("images/right.gif");
ImageIcon middleButtonIcon = createImageIcon("images/middle.gif");
ImageIcon rightButtonIcon = createImageIcon("images/left.gif");
b1 = new JButton("Disable middle button", leftButtonIcon);
b1.setVerticalTextPosition(AbstractButton.CENTER);
b1.setHorizontalTextPosition(AbstractButton.LEADING); //aka LEFT, for left-to-right locales
b1.setMnemonic(KeyEvent.VK_D);
b1.setActionCommand("disable");
b2 = new JButton("Middle button", middleButtonIcon);
b2.setVerticalTextPosition(AbstractButton.BOTTOM);
b2.setHorizontalTextPosition(AbstractButton.CENTER);
b2.setMnemonic(KeyEvent.VK_M);
b3 = new JButton("Enable middle button", rightButtonIcon);
//Use the default text position of CENTER, TRAILING (RIGHT).
b3.setMnemonic(KeyEvent.VK_E);
b3.setActionCommand("enable");
b3.setEnabled(false);
//Listen for actions on buttons 1 and 3.
b1.addActionListener(this);
b3.addActionListener(this);
b1.setToolTipText("Click this button to disable "
+ "the middle button.");
b2.setToolTipText("This middle button does nothing "
+ "when you click it.");
b3.setToolTipText("Click this button to enable the "
+ "middle button.");
...
}
public void actionPerformed(ActionEvent e) {
if ("disable".equals(e.getActionCommand())) {
b2.setEnabled(false);
b1.setEnabled(false);
b3.setEnabled(true);
} else {
b2.setEnabled(true);
b1.setEnabled(true);
b3.setEnabled(false);
}
}
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = ButtonDemo.class.getResource(path);
...//error handling omitted for clarity...
return new ImageIcon(imgURL);
}
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