JTree的事件

来源：互联网发布：阿波罗20号知乎编辑：程序博客网时间：2024/05/17 03:11

事件一：鼠标事件

DefaultMutableTreeNode top= new DefaultMutableTreeNode("列表管理");
  tree = new JTree(top);
  createNodes(top);
  tree.getSelectionModel().setSelectionMode(
    TreeSelectionModel.SINGLE_TREE_SELECTION);
  MouseListener ml = newMouseAdapter() {
    public void mousePressed(MouseEvent e) {
     DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree
       .getLastSelectedPathComponent();
     if(node == null) {
      return;
     }
     if(!node.isLeaf()) {
      return;
     }
     ObjectnodeInfo = node.getUserObject();
     OperateInfooperate = (OperateInfo) nodeInfo;
     display(operate.demo);
       }
   };
  tree.addMouseListener(ml);

事件二：节点选中事件

// Listen for when theselection changes.
tree.addTreeSelectionListener(newTreeSelectionListener() {

   publicvoid valueChanged(TreeSelectionEvent e) {
    DefaultMutableTreeNodenode = (DefaultMutableTreeNode) tree
      .getLastSelectedPathComponent();
    if(node == null) {
     return;
    }
    if(!node.isLeaf()) {
     return;
    }
    ObjectnodeInfo = node.getUserObject();
    OperateInfooperate = (OperateInfo) nodeInfo;
    displayURL(operate.demo);
   }

});

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