import java.util.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;/** * Description: * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author  Yeeku.H.Lee kongyeeku@163.com * @version  1.0 */public class TestListRendering{	private JFrame mainWin = new JFrame("好友列表");	private String[] friends = new String[]	{		"李清照",		"蘇格拉底",		"李白",		"弄玉",		"虎頭"	};	//定義一個JList對象	private JList friendsList = new JList(friends);	public void init()	{		//設置該JList使用ImageCellRenderer作為單元格繪制器		friendsList.setCellRenderer(new ImageCellRenderer()); 		mainWin.add(new JScrollPane(friendsList));		mainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);		mainWin.pack();		mainWin.setVisible(true);	}	public static void main(String[] args) 	{		new TestListRendering().init();	}}class ImageCellRenderer extends JPanel implements ListCellRenderer{	private ImageIcon icon;	private String name;	//定義繪制單元格時的背景色	private Color background;	//定義繪制單元格時的前景色	private Color foreground;	public Component getListCellRendererComponent(JList list, Object value, int index, 	  boolean isSelected, boolean cellHasFocus)	{		icon = new ImageIcon("ico/" + value + ".gif");		name = value.toString();		background = isSelected ? list.getSelectionBackground() : list.getBackground();		foreground = isSelected ? list.getSelectionForeground() : list.getForeground();		//返回該JPanel對象作為單元格繪制器		return this;	}	//重寫paintComponent方法，改變JPanel的外觀	public void paintComponent(Graphics g)	{		int imageWidth = icon.getImage().getWidth(null);		int imageHeight = icon.getImage().getHeight(null);		g.setColor(background);		g.fillRect(0, 0, getWidth(), getHeight());		g.setColor(foreground);		//繪制好友圖標		g.drawImage(icon.getImage() , getWidth() / 2 - imageWidth / 2 , 10 , null);		g.setFont(new Font("SansSerif" , Font.BOLD , 18));		//繪制好友用戶名		g.drawString(name, getWidth() / 2 - name.length() * 10 , imageHeight + 30 );	}	//通過該方法來設置該ImageCellRenderer的最佳大小	public Dimension getPreferredSize()	{  		return new Dimension(60, 80);	}}