package qq.client.panel;import java.awt.BorderLayout;import java.awt.Color;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.util.List;import javax.swing.*;import javax.swing.border.Border;import javax.swing.tree.TreePath;import qq.client.ClientMainClass;import qq.entity.User;public class UserListPanel extends JPanel {	private static final long serialVersionUID = 1252421L;	private JTree tree ;	private MyTreeModel m;		public UserListPanel() {		Border line = BorderFactory.createLineBorder(new Color(74,133, 213));		this.setLayout(new BorderLayout());		this.setBorder(line);		m=new MyTreeModel(ClientMainClass.onlineUsers);		tree= new JTree(m);		tree.setCellRenderer(new MyTreeCellRenderer());		tree.addMouseListener(new MouseAdapter(){			@Override			public void mouseClicked(MouseEvent e) {				//右鍵菜單				if(e.getButton()==MouseEvent.BUTTON3){					TreePath pt=tree.getPathForLocation(e.getX(), e.getY());					if(pt!=null){						Object obj=pt.getLastPathComponent();						if (obj instanceof User) {							User user = (User) obj;							new MouseRightMenu(user).show(tree, e.getX(), e.getY());						}								}				}			}		});		JScrollPane jsp=new JScrollPane(tree); 		this.add(jsp);	}	public void freash(List<User> onlineUsers){		m.setRoot(onlineUsers);		SwingUtilities.updateComponentTreeUI(tree);			}}