package  treetest1;

 import  javax.swing.tree.*;

/*
 * TreeFrame.java
 *
 * Created on 2 Сентябрь 2006 г., 12:11
 */

/**
 *
 * @author  Alexander
 */
 public   class  TreeFrame  extends  javax.swing.JFrame {
    
    /** Creates new form TreeFrame */
     public  TreeFrame() {
        initComponents();
        setDefaultTree();
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">                          
     private   void  initComponents() {
        jScrollPane1 =  new  javax.swing.JScrollPane();
        jTree1 =  new  javax.swing.JTree();
        jButton1 =  new  javax.swing.JButton();
        jButton2 =  new  javax.swing.JButton();
        jButton3 =  new  javax.swing.JButton();
        jButton4 =  new  javax.swing.JButton();
        jButton5 =  new  javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jScrollPane1.setViewportView(jTree1);

        jButton1.setText("New leaf");
        jButton1.addActionListener( new  java.awt.event.ActionListener() {
             public   void  actionPerformed(java.awt.event.ActionEvent evt) {
                newLeaf(evt);
            }
        });

        jButton2.setText("Delete");
        jButton2.addActionListener( new  java.awt.event.ActionListener() {
             public   void  actionPerformed(java.awt.event.ActionEvent evt) {
                deleteItem(evt);
            }
        });

        jButton3.setText("Delete all");
        jButton3.addActionListener( new  java.awt.event.ActionListener() {
             public   void  actionPerformed(java.awt.event.ActionEvent evt) {
                deleteAll(evt);
            }
        });

        jButton4.setText("Default");
        jButton4.addActionListener( new  java.awt.event.ActionListener() {
             public   void  actionPerformed(java.awt.event.ActionEvent evt) {
                setDefaultTreeBut(evt);
            }
        });

        jButton5.setText("New folder");
        jButton5.addActionListener( new  java.awt.event.ActionListener() {
             public   void  actionPerformed(java.awt.event.ActionEvent evt) {
                newFolder(evt);
            }
        });

        org.jdesktop.layout.GroupLayout layout =  new  org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,  576 ,  Short .MAX_VALUE)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .add(jButton5)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jButton1)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jButton2, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE,  73 , org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(jButton3)
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED,  161 ,  Short .MAX_VALUE)
                .add(jButton4)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .add(jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE,  403 ,  Short .MAX_VALUE)
                .add( 19 ,  19 ,  19 )
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jButton4)
                    .add(jButton2)
                    .add(jButton3)
                    .add(jButton5)
                    .add(jButton1))
                .addContainerGap())
        );
        pack();
    }// </editor-fold>                        
        /**
         * Удаление всех узов в выбраной ветке.
         */
     private   void  deleteAll(java.awt.event.ActionEvent evt) {                           
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)jTree1.getLastSelectedPathComponent();
        
         if  (selectedNode ==  null )  return ;
        
        //DefaultMutableTreeNode parent = (DefaultMutableTreeNode)selectedNode.getParent();
         int  childs = selectedNode.getChildCount();
        
         for  ( int  i =  0 ; i < childs; i++)
            model.removeNodeFromParent((DefaultMutableTreeNode) selectedNode.getChildAt( 0 ));
        
            //model.(selectedNode);
    }                          

     private   void  setDefaultTreeBut(java.awt.event.ActionEvent evt) {                                   
        setDefaultTree();
    }                                  
    /**
     * Добавление нового листа в указанную
     * ветку дерева.
     */
     private   void  newLeaf(java.awt.event.ActionEvent evt) {                         
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)jTree1.getLastSelectedPathComponent();
        
         if  (selectedNode ==  null )  return ;
        
        DefaultMutableTreeNode parent = (DefaultMutableTreeNode)selectedNode.getParent();

         if  (parent ==  null )  return ;
        
        DefaultMutableTreeNode newNode =  new  DefaultMutableTreeNode("Новый лист");
        newNode.setAllowsChildren(false);
         int  selectedIndex = parent.getIndex(selectedNode);
        model.insertNodeInto(newNode, parent, selectedIndex +  1 );
        
        // Отображение нового узла.
        TreeNode [] nodes = model.getPathToRoot(newNode);
        TreePath path =  new  TreePath(nodes);
        jTree1.scrollPathToVisible(path);
    }                        
    /** 
     * Добавление новой папки в указанную
     * ветку дерева.
     */
     private   void  newFolder(java.awt.event.ActionEvent evt) {                           
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)jTree1.getLastSelectedPathComponent();
        
         if  (selectedNode ==  null )  return ;
        
        DefaultMutableTreeNode parent = (DefaultMutableTreeNode)selectedNode.getParent();
        
         if  (parent ==  null )  return ;
        
        DefaultMutableTreeNode newNode =  new  DefaultMutableTreeNode("Новая папка");
         int  selectedIndex = parent.getIndex(selectedNode);
        model.insertNodeInto(newNode, parent, selectedIndex +  1 );
        
        // Отображение нового узла.
        TreeNode [] nodes = model.getPathToRoot(newNode);
        TreePath path =  new  TreePath(nodes);
        jTree1.scrollPathToVisible(path);
    }                          
    /**
     * Удаление выделеного узла.
     */
     private   void  deleteItem(java.awt.event.ActionEvent evt) {                            
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)jTree1.getLastSelectedPathComponent();
        
         if  (selectedNode !=  null  && selectedNode.getParent() !=  null )
            model.removeNodeFromParent(selectedNode);
    }                           
    
    /**
     * @param args the command line arguments
     */
     public   static   void  main(String args[]) {
        java.awt.EventQueue.invokeLater( new  Runnable() {
             public   void  run() {
                 new  TreeFrame().setVisible(true);
            }
        });
    }
    
    /**
     * Установка структуры дерева по умолчанию
     */
     public   void  setDefaultTree(){
        // Корневой узел
        DefaultMutableTreeNode root =  new  DefaultMutableTreeNode("Дерево");
         for  ( int  i =  1 ; i <  4 ; i++){
            // Содержимое корневого узла 
            DefaultMutableTreeNode folder =  new  DefaultMutableTreeNode("Узел" + i);
            root.add(folder);
             for  ( int  j =  1 ; j <  7 ; j++){
                // Содержимое папок корневого узла
                DefaultMutableTreeNode leaf =  new  DefaultMutableTreeNode("Лист" + j);
                leaf.setAllowsChildren(false);
                folder.add(leaf);
            }
        }
        model =  new  DefaultTreeModel(root, true);
        jTree1.setModel(model);
    }
    
     private  DefaultTreeModel model;
    // Variables declaration - do not modify                     
     private  javax.swing.JButton jButton1;
     private  javax.swing.JButton jButton2;
     private  javax.swing.JButton jButton3;
     private  javax.swing.JButton jButton4;
     private  javax.swing.JButton jButton5;
     private  javax.swing.JScrollPane jScrollPane1;
     private  javax.swing.JTree jTree1;
    // End of variables declaration                   
    
}

 package  treetest1;

/**
 *
 * @author Alexander
 */
 public   class  Main {
    
    /** Creates a new instance of Main */
     public  Main() {
    }
    
    /**
     * @param args the command line arguments
     */
     public   static   void  main(String[] args) {
         new  TreeFrame().setVisible(true);
    }
    
}

org.jdesktop.layout.GroupLayout