如何使JTree不显示根节点 ，而显示根下面的叶

Question

没有root，那么怎么建立Tree的呢？
JTree myJTree = new JTree(难道这里什么都没有？);
gzing.....

Answer 1

//..
jTree1.setModel(model) ;
jTree1.setCellRenderer(new DomainTreeCellRenderer());
jTree1.putClientProperty("JTree.lineStyle", "Angled");   class DomainTreeCellRenderer extends JLabel implements TreeCellRenderer {
      public DomainTreeCellRenderer(){
         setOpaque(true);
      }
      public Component getTreeCellRendererComponent(JTree tree,
            Object value,
            boolean selected,
            boolean expanded,
            boolean leaf,
            int row,
            boolean hasFocus)
      {
          if (value instanceof 你的根结点){
            setText("");  //这样就可以了
          else
            setText("XXXXX");          setBackground(Color.white) ;
         if (selected == true) setBackground(Color.gray );
         return this;
      }
   }

Answer 2

呵呵，楼主自己UP太辛苦了吧。帅哥，这就是你要的不显示根节点的东东
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;public class TreeDemo1
{
    public TreeDemo1()
    {
        JFrame f = new JFrame("TreeDemo");
        Container contentPane = f.getContentPane();
        
        String[] s1 = {"公司文件","个人信件","私人文件"};
        String[] s2 = {"本机磁盘(C:)","本机磁盘(D:)","本机磁盘(E:)"};
        String[] s3 = {"奇摩站","职棒消息","网络书店"};
        Hashtable hashtable1 = new Hashtable();
        Hashtable hashtable2 = new Hashtable();
        hashtable1.put("我的公文包",s1);
        hashtable1.put("我的电脑",s2);
        hashtable1.put("收藏夹",hashtable2);
        hashtable2.put("网站列表",s3);
        JTree tree = new JTree(hashtable1);
        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setViewportView(tree);
        
        contentPane.add(scrollPane);
        f.pack();
        f.setVisible(true);
        
        f.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });    }    public static void main(String args[]) {
    
        new TreeDemo1();
    }
}