SchemaVisualization.java 文件源码

public void itemStateChanged(ItemEvent e) {
   JMenuItem source = (JMenuItem)(e.getSource());
   String s = "Item event detected.\n"
              + "    Event source: " + source.getText()
              + " (an instance of " + source.getClass().getName() + ")\n"
              + "    New state: "
              + ((e.getStateChange() == ItemEvent.SELECTED) ?
                "selected":"unselected") + "\n\n";
   System.err.println(s);
}