java从入门到精髓 - Swing树组件JTreeTest

import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;

public class JTreeTest  extends JFrame{

    public JTreeTest()
    {
        super();
        setTitle("Swing树组件");
        setBounds(100,100,350,150);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("根节点");
        DefaultMutableTreeNode nodeFirst = new DefaultMutableTreeNode("一级节点A");
        root.add(nodeFirst);
        //创建不允许有节点的二级节点
        DefaultMutableTreeNode nodeSecond = new DefaultMutableTreeNode("二级子节点",false);
        nodeFirst.add(nodeSecond);
        root.add(new DefaultMutableTreeNode("二级节点B"));
        JTree treeRoot = new JTree(root);
        getContentPane().add(treeRoot,BorderLayout.WEST);
        //利用根节点创建树模型，采用默认方法
        DefaultTreeModel treeModelDefault = new DefaultTreeModel(root);   //树模型,判断子结点
        JTree treeDefault = new JTree(treeModelDefault);
        getContentPane().add(treeDefault,BorderLayout.CENTER);
        //利用根节点创建模型,非默认方法：
        DefaultTreeModel treeModelPointed = new DefaultTreeModel(root,true); //树模型,不判断子结点
        JTree treePointed= new JTree(treeModelPointed);
        getContentPane().add(treePointed,BorderLayout.EAST);
    }
    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        JTreeTest jTreeTest = new JTreeTest();
        jTreeTest.setVisible(true);
    }

}