响应节点选择

Question

我刚刚将示例代码从https://docs.oracle.com/javase/tutorial/uiswing/components/tree.html（响应节点选择）复制到我的中，如下所示

public class IHM_PRO_CHIC extends JFrame implements ActionListener,KeyListener {

public IHM_PRO_CHIC () {
    super();
    this.addKeyListener(this);
    cree_ihm();
    };

private void cree_ihm() {

        DefaultMutableTreeNode top = new DefaultMutableTreeNode("CHIC");
        Tree tree = new Tree (tree_file,top);
        JScrollPane treeView = new JScrollPane(tree);
        treeView.setVisible(true);  
        pane.add("Center",treeView);
        pane.setVisible(true);

        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);        
        tree.addTreeSelectionListener(this);

};

public void valueChanged(TreeSelectionEvent e) {
//Returns the last path element of the selection.
//This method is useful only when the selection model allows a single selection.
DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                   tree.getLastSelectedPathComponent();

if (node == null)
//Nothing is selected.     
return;

Object nodeInfo = node.getUserObject();
if (node.isLeaf()) {
    BookInfo book = (BookInfo)nodeInfo;
    displayURL(book.bookURL);
} else {
    displayURL(helpURL); 
}
}

我收到以下错误

error: IHM_PRO_CHIC is not abstract and does not override abstract method actionPerformed(ActionEvent) in ActionListener
public class IHM_PRO_CHIC extends JFrame implements ActionListener,KeyListener {

../ihm_pro_chic/IHM_PRO_CHIC.java:202: error: method addTreeSelectionListener in class JTree cannot be applied to given types;
            tree.addTreeSelectionListener(this);
                ^
  required: TreeSelectionListener
  found: IHM_PRO_CHIC
  reason: actual argument IHM_PRO_CHIC cannot be converted to TreeSelectionListener by method invocation conversion

我的目标是在点击两次节点时启动一个事件。

更新：除了使用接口之外，是否有更快的方式来响应节点点击？