示例#1
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  /**
   * Create a button to go inside of the toolbar. By default this will load an image resource. The
   * image filename is relative to the classpath (including the '.' directory if its a part of the
   * classpath), and may either be in a JAR file or a separate file.
   *
   * @param key The key in the resource file to serve as the basis of lookups.
   */
  protected JButton createToolbarButton(String key) {
    URL url = getResource(key + imageSuffix);
    JButton b =
        new JButton(new ImageIcon(url)) {

          @Override
          public float getAlignmentY() {
            return 0.5f;
          }
        };
    b.setRequestFocusEnabled(false);
    b.setMargin(new Insets(1, 1, 1, 1));

    String astr = getProperty(key + actionSuffix);
    if (astr == null) {
      astr = key;
    }
    Action a = getAction(astr);
    if (a != null) {
      b.setActionCommand(astr);
      b.addActionListener(a);
    } else {
      b.setEnabled(false);
    }

    String tip = getResourceString(key + tipSuffix);
    if (tip != null) {
      b.setToolTipText(tip);
    }

    return b;
  }
 public JButton createImageButton(Action a) {
   JButton b = new JButton(a);
   b.setMargin(new Insets(0, 0, 0, 0));
   return b;
 }