使用DefaultMutableTreeNode构造Tree

package _14;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTree;

import javax.swing.tree.DefaultMutableTreeNode;

public class TreeNodeConstructTree extends JFrame {

public TreeNodeConstructTree() {

// 构建树形节点结构

DefaultMutableTreeNode root = new DefaultMutableTreeNode("字母表");

DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("大写字母");

DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("小写字母");

DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("Readme");

// 组装节点层级

root.add(node1);

root.add(node2);

root.add(node3);

// 为大写/小写字母节点添加子节点

node1.add(new DefaultMutableTreeNode("A"));

node1.add(new DefaultMutableTreeNode("B"));

node2.add(new DefaultMutableTreeNode("a"));

node2.add(new DefaultMutableTreeNode("b"));

// 创建树形组件并放入滚动面板

JTree tree = new JTree(root);

JScrollPane scrollPane = new JScrollPane();

scrollPane.setViewportView(tree);

add(scrollPane);

}

public static void main(String[] args) {

TreeNodeConstructTree frame = new TreeNodeConstructTree();

frame.setTitle("TreeNodeConstructTree");

frame.setSize(300, 300);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}