jtreedemo.java~6~

里面所含源码是本人平时做程序的一些实例

package JSwingDemo;
import java.awt.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.event.*;
public class JTreeDemo extends JFrame {
    static int i=0;;
    DefaultMutableTreeNode root,child,chosen;
    JTree tree;
    DefaultTreeModel model;
    String [][]data={{"体育","足球","篮球","乒乓球"},{"娱乐","唱歌","跳舞","相声"},{"电视","长虹","海尔","创维"},{"戏剧","京剧","川剧","越剧"},{"国家","中国","美国"},{"飞机","大炮"}};
    public JTreeDemo() {
        Container contPane=this.getContentPane();
        JPanel jp1=new JPanel(new BorderLayout());
        root=new DefaultMutableTreeNode("根");
        tree=new JTree(root);
        jp1.add(new JScrollPane(tree),BorderLayout.CENTER);
        model=(DefaultTreeModel)tree.getModel();
        JButton btn1=new JButton("添加节点");
        btn1.addActionListener(new ActionListener(){
               public void actionPerformed(ActionEvent ae){
                   if(i<data.length){
                       child=new Branch(data[i++]).node();
                       chosen=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
                       if(chosen==null){
                           chosen=root;
                       }
                       model.insertNodeInto(child,chosen,0);
                   }
               }
        } );
        btn1.setBackground(Color.blue);
        btn1.setForeground(Color.white);
        JPanel jp2=new JPanel();
        jp2.add(btn1);
        jp1.add(jp2,BorderLayout.SOUTH);
        contPane.add(jp1);
        this.setTitle("JTreeDemo");
        this.setSize(300,500);
        this.setLocation(400,400);
        setVisible(true);
    }
}
class Branch{
    DefaultMutableTreeNode r;
    public Branch(String data[]){
        r=new DefaultMutableTreeNode(data[0]);
        for(int i=1;i<data.length;i++){
            r.add(new DefaultMutableTreeNode(data[i]));
        }
    }
    public DefaultMutableTreeNode node(){
        return r;
    }
    public static void main(String []args){
        JTreeDemo test=new JTreeDemo();
    }
}