java控件之树形结构JTree

 import javax.swing.JFrame;
 import javax.swing.JTree;
 import javax.swing.event.TreeSelectionEvent;
 import javax.swing.event.TreeSelectionListener;
 import javax.swing.tree.DefaultMutableTreeNode;

 import org.eclipse.swt.widgets.Tree;

 /**
  * 树状结构
  *
  * @author 404
  */
 public class jtree extends JFrame {

     public jtree() {

         //先实例化的是父节点，实例化完父节点之后，再实例化子节点
         DefaultMutableTreeNode Goodfriend = new DefaultMutableTreeNode("我的好友");
         Goodfriend.add(new DefaultMutableTreeNode("好友1"));
         Goodfriend.add(new DefaultMutableTreeNode("好友2"));
         Goodfriend.add(new DefaultMutableTreeNode("好友3"));

         DefaultMutableTreeNode Webfriend = new DefaultMutableTreeNode("我的网友");
         Webfriend.add(new DefaultMutableTreeNode("网友1"));
         Webfriend.add(new DefaultMutableTreeNode("网友2"));
         Webfriend.add(new DefaultMutableTreeNode("网友3"));
         DefaultMutableTreeNode Doub = new DefaultMutableTreeNode("逗逼");
         //用Doub这个对象add，那么逗逼就是最高级了。
         Doub.add(Goodfriend);
         Doub.add(Webfriend);
         JTree jTree = new JTree(Doub);
         this.add(jTree);
         this.setTitle("JTree控件演示");
         this.setSize(200, 300);
         this.setVisible(true);
         this.setLocationRelativeTo(null);//居中
     }
     public static void main(String[] args) {
         new jtree();
     }
 }

运行结果：