Java用户树形结构

package simpletreetest;
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import javax.swing.text.AbstractDocument.BranchElement;
public class MyFrame extends JFrame{
    private JTree tree;

    public MyFrame(){
        setTree();
        this.add(tree);
        this.setSize(500,300);
    }

    public void setTree(){
        DefaultMutableTreeNode lx=new DefaultMutableTreeNode("联系人");
        DefaultMutableTreeNode qr=new DefaultMutableTreeNode("亲人");
        DefaultMutableTreeNode ba=new DefaultMutableTreeNode("爸爸");
        DefaultMutableTreeNode jj=new DefaultMutableTreeNode("姐姐");
        DefaultMutableTreeNode tx=new DefaultMutableTreeNode("同学");
        DefaultMutableTreeNode cy=new DefaultMutableTreeNode("程远");
        DefaultMutableTreeNode py=new DefaultMutableTreeNode("朋友");
        DefaultMutableTreeNode wz=new DefaultMutableTreeNode("武总");

        lx.add(qr);
        qr.add(ba);
        qr.add(jj);

        lx.add(tx);
        tx.add(cy);

        lx.add(py);
        py.add(wz);

        tree=new JTree(lx);
        tree.addTreeSelectionListener(new TreeSelectionListener() {

            public void valueChanged(TreeSelectionEvent e) {
                DefaultMutableTreeNode node=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
                if(node==null) return;
                if(node.isLeaf()){
                    leaf(node);
                }else{
                  branch(node);
                }

            }
        });
    }
       private void leaf(DefaultMutableTreeNode node){
       System.out.println("叶节点：" + node.getUserObject());
       }


       private void branch(DefaultMutableTreeNode node) {
         System.out.println("枝节点：" + node.getUserObject());
       }


      public static void main(String[] args) {
         JFrame frame = new MyFrame();
         frame.setVisible(true);
}
}

运行效果：

参考资料：