在列表填充器中使用其它方法，列表填充器方法,public class

在列表填充器中使用其它方法，列表填充器方法,public class

public class GenericListCellRenderer extends DefaultListCellRenderer {     protected String method;     public GenericListCellRenderer(String method) {        super();        this.method = method;    }    public Component getListCellRendererComponent(JList list, Object value,         int index, boolean isSelected, boolean cellHasFocus) {        JLabel label = (JLabel)super.getListCellRendererComponent(            list,value,index, isSelected, cellHasFocus);       try {           Method meth = value.getClass().getMethod(method,null);           if(meth != null) {               Object retval = meth.invoke(value,null);               label.setText(""+retval);           }       } catch (Exception ex) {           System.out.println("got an execption: " + ex);            ex.printStackTrace();           label.setText(""+value);       }       return label;}     public static void main(String[] args) {         String[] data = { "Proton", "Neutron", "Electron" };         JList list = new JList(data);         //GenericListCellRenderer renderer=new GenericListCellRenderer("toString");GenericListCellRenderer renderer=new GenericListCellRenderer("hashCode");         list.setCellRenderer(renderer);         JFrame frame = new JFrame("Cell Renderer Hack");         frame.getContentPane().add(list);         frame.pack();         frame.setVisible(true);     }}//该片段来自于http://byrx.net