代码如下：
DefaultMutableTreeNode parentNode=(DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
if(parentNode==null){
return;
}
DefaultMutableTreeNode node=new DefaultMutableTreeNode(tfadd.getText());
TreePath selectPath=tree.getSelectionPath();
System.out.println(selectPath);
treeModel.insertNodeInto(node, parentNode, parentNode.getChildCount());
TreeNode[] nodes=treeModel.getPathToRoot(node);
TreePath path=new TreePath(nodes);
tree.scrollPathToVisible(path);
tree.setSelectionPath(path);
tree.startEditingAtPath(path);
tree.repaint();
// TreePath path=selectPath.pathByAddingChild(node);
// if(!tree.isVisible(path)){
// tree.makeVisible(path);
// }
// tree.clearSelection();
}
只粘贴了按钮事件的代码？？
请求帮忙？？？
------解决方案--------------------
你把整个代码贴出来看看吧，这样也方便调试
------解决方案--------------------
给楼主一段代码做参考:
- Java code
import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTree;import javax.swing.tree.DefaultMutableTreeNode;import javax.swing.tree.DefaultTreeModel;public class TestJTree extends JFrame { private JButton button ; private JTree tree ; private int treeNodeNum = 1 ; DefaultMutableTreeNode _rootNode = new DefaultMutableTreeNode("root"); DefaultTreeModel _defaultTreeModel = new DefaultTreeModel(_rootNode); public TestJTree(){ super(); this.setSize(300, 400); button = new JButton("添加树节点"); button.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { DefaultMutableTreeNode _newNode = new DefaultMutableTreeNode("新添加的树节点_"+treeNodeNum); _rootNode.add(_newNode); _defaultTreeModel.reload(); treeNodeNum++; } }); tree = new JTree(); tree.setModel(_defaultTreeModel); this.getContentPane().add(tree,BorderLayout.CENTER); this.getContentPane().add(button,BorderLayout.SOUTH); } public static void main(String[] args){ TestJTree testJTree = new TestJTree(); testJTree.setVisible(true); } }