JTree的简单使用实例
/**
?*
?*/
package JavaGUI;
import java.awt.Color;
import java.awt.FlowLayout;
import javax.swing.tree.*;
import javax.swing.*;
/**
?* @author:FlyingFire
?* @date:2011-6-18
?* @time:10:40:25
?*/
public class JTreeTest extends JFrame{
?/**
? * JTree 测试用例
? */
?//显示界面
?public void showFrame(){
??this.setTitle("JTree测试用例");
??this.setSize(400,400);
??this.add(createTree());
??this.setResizable(false);
??this.setLayout(new java.awt.FlowLayout());
??this.setLocationRelativeTo(null);
??this.setDefaultCloseOperation(3);
??this.setVisible(true);
?}
?//创建JPopupMenu对象，并将其返回
?public JPopupMenu createPM(){
??JPopupMenu pm=new JPopupMenu();
???? JMenuItem item1=new JMenuItem ("打开");
???? JMenuItem item2=new JMenuItem("保存");
???? JMenuItem item3=new JMenuItem("退出");
???? pm.add(item1);
???? pm.add(item2);
???? pm.add(item3);
????
???? item1.setActionCommand("open");
???? item2.setActionCommand("save");
???? item3.setActionCommand("exit");
????
??????? return pm;
?}
?//创建树对象
?public JTree createTree(){
??//创建对象
??JTree tree=new JTree();
??//
??DefaultMutableTreeNode rootNode=new DefaultMutableTreeNode();
??//创建根节点的对象
??rootNode.setUserObject("根节点");
??//创建根节点下的分组节点
??for(int i=0;i<5;i++){
???DefaultMutableTreeNode teamNode=new DefaultMutableTreeNode();
????? teamNode.setUserObject("第"+i+"根树枝");
????? for(int j=0;j<6;j++){
????? ?DefaultMutableTreeNode leafNode=new DefaultMutableTreeNode();
????? ?leafNode.setUserObject("第"+j+"片叶子");
????????? teamNode.add(leafNode);
?????????
????? }
????? rootNode.add(teamNode);
??}
??//设定默认的树结构模式
??DefaultTreeModel model=new DefaultTreeModel(rootNode);
??????? tree.setModel(model);
??javax.swing.ImageIcon icon=new ImageIcon("src\\images\\leaf.png");
??DefaultTreeCellRenderer renderer=new DefaultTreeCellRenderer();
??//设定叶节点的图标
??renderer.setLeafIcon(icon);
??//设定分组被收起后的图标
??renderer.setClosedIcon(icon);
??//设定分组展开时的图标
??????? renderer.setOpenIcon(icon);
??????? //设定被选项的边缘框的颜色
??renderer.setBorderSelectionColor(Color.red);
??//将renderer对象对JTree所做的各种修饰效果添加到界面
??tree.setCellRenderer(renderer);
??return tree;
?}
?public static void main(String[] args) {
??JTreeTest jtt=new JTreeTest();
??jtt.showFrame();
?}
}
?
