如何在DefaultMutableTreeNode上获得鼠标侦听器？

Question

我知道我可以给Jtree添加一个mouseListener，但我需要双击他的一个元素和doSomething（）;

Answer 1

检查： -

public class NetworkTree extends JPanel implements TreeSelectionListener { 
    private JTree tree; 
    private static int PANEL_WIDTH=250; 
    private static int PANEL_HEIGHT=500; 
private static String lineStyle = "Horizontal"; 

public NetworkTree() { 
DefaultMutableTreeNode top = new DefaultMutableTreeNode(new Site(
       1,1,"Network","",3)); 
getSubNodes(top,0); 
tree = new JTree(top); 
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION); 
tree.addTreeSelectionListener(this); 
JScrollPane treeView = new JScrollPane(tree); 
add(treeView); 

tree.addMouseListener(new MouseAdapter() { 
    public void mouseClicked(MouseEvent me) { 
    newNodeSelected(); 
    } 
}); 
} 
..... 
    public void newNodeSelected() { 
    JOptionPane.showMessageDialog(null,"Hello"); 
} 

..... }

Answer 2

从documentation of JTree：

如果你是兴趣检测双击事件或当 一个用户点击一个节点，不管它是否被选中，我们推荐你做以下操作：

final JTree tree = ...; 

MouseListener ml = new MouseAdapter() { 
    public void mousePressed(MouseEvent e) { 
     int selRow = tree.getRowForLocation(e.getX(), e.getY()); 
     TreePath selPath = tree.getPathForLocation(e.getX(), e.getY()); 
     if(selRow != -1) { 
      if(e.getClickCount() == 1) { 
       mySingleClick(selRow, selPath); 
      } 
      else if(e.getClickCount() == 2) { 
       myDoubleClick(selRow, selPath); 
      } 
     } 
    } 
}; 
tree.addMouseListener(ml);