Java JTree_1

package com.han;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;

public class JTree_1 extends JFrame {
/**
*
*/
private static final long serialVersionUID = -2628449366554214781L;
public JTree_1() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("根节点");
DefaultMutableTreeNode nodeFirst = new DefaultMutableTreeNode("一级子节点A");
root.add(nodeFirst);
DefaultMutableTreeNode nodeSecond = new DefaultMutableTreeNode("二级子节点", false);
nodeFirst.add(nodeSecond);
root.add(new DefaultMutableTreeNode("一级子节点B"));
JTree treeRoot = new JTree(root);
getContentPane().add(treeRoot, BorderLayout.WEST);

DefaultTreeModel defaultTreeModel = new DefaultTreeModel(root);
JTree treeDefault = new JTree(defaultTreeModel);
getContentPane().add(treeDefault, BorderLayout.CENTER);

// recommended creating method
DefaultTreeModel pointedTreeModel = new DefaultTreeModel(root, true);
JTree treePointed = new JTree(pointedTreeModel);
getContentPane().add(treePointed, BorderLayout.EAST);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
JTree_1 instance = new JTree_1();
instance.setVisible(true);
instance.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
instance.pack();
}

}

摘自 Gaowen_HAN的专栏