如何将jtree与jframes相关联

Question

美好的一天

我试图在jtree的节点和它的jframe之间建立链接 是左边的树，论坛将显示在右边 这是一个例子 Jtree and frame

这是我的代码

     JTree tree = new JTree();
 Employee emp = new Employee();
 rectutment rec = new rectutment();
 interview inter = new interview();

         DefaultMutableTreeNode firstLeaf = ((DefaultMutableTreeNode)tree.getModel().getRoot()).getFirstLeaf();
         DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
         DefaultMutableTreeNode root = (DefaultMutableTreeNode) model.getRoot();
         tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
         root.add(firstLeaf);
         firstLeaf.add(new DefaultMutableTreeNode("firstleaf"));
                model.reload();
                emp.add(tree);
                emp.pack();
                emp.setVisible(true);
                DefaultMutableTreeNode SecondLeaf = ((DefaultMutableTreeNode)tree.getModel().getRoot()).getLastLeaf();
              DefaultTreeModel modelx = (DefaultTreeModel) tree.getModel();
         DefaultMutableTreeNode rootx = (DefaultMutableTreeNode) model.getRoot();
         tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
         rootx.add(SecondLeaf);
         firstLeaf.add(new DefaultMutableTreeNode("secondleaf"));
         modelx.reload();
                rec.add(tree);
                rec.pack();
                rec.setVisible(true);
                  if (firstLeaf.isNodeDescendant(root)){
             emp.setVisible(true);

         }
                  else 
                        if (firstLeaf.isNodeDescendant(root)){
         {

                  rec.setVisible(false);    

         }

                  if (SecondLeaf.isLeaf()){
             emp.setVisible(true);  
         }
                  else 
         {  
                  rec.setVisible(false);    
         }       
         }
    }  

任何想法？