javax.swing.LookAndFeel#isSupportedLookAndFeel ( )源码实例Demo

/**
 *
 */
private void addToMenu(String name, String className, JMenu menu) {
  logger.debug("PLAF LookAndFeelInfo  {}", className);
  boolean isSupported = true;
  try {
    Class cl = Class.forName(className);
    LookAndFeel lf = (LookAndFeel) cl.newInstance();
    if (!lf.isSupportedLookAndFeel()) {
      isSupported = false;
    }
  } catch (Throwable t) {
    isSupported = false;
  }

  AbstractAction act = new PLAFAction(name, className);
  JMenuItem mi = menu.add(act);
  if (!isSupported) {
    mi.setEnabled(false);
  }
}
 

/**
 * A utility function that layers on top of the LookAndFeel's
 * isSupportedLookAndFeel() method. Returns true if the LookAndFeel
 * is supported. Returns false if the LookAndFeel is not supported
 * and/or if there is any kind of error checking if the LookAndFeel
 * is supported.
 * 
 * The L&F menu will use this method to detemine whether the various
 * L&F options should be active or inactive.
 *
 * @param laf the laf
 * @return true, if is available look and feel
 */
protected boolean isAvailableLookAndFeel(String laf) {
	try { 
		Class lnfClass = Class.forName(laf);
		LookAndFeel newLAF = (LookAndFeel)(lnfClass.newInstance());
		return newLAF.isSupportedLookAndFeel();
	} catch(Exception e) { // If ANYTHING weird happens, return false
		return false;
	}
}