关于JTree树的鼠标点击事件
JTree中如何获得我点击的每个节点的值，也就是说在我点击这棵树的任意一个结点时，怎样才能确定我当前正在点击的是哪一个结点。

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public java.lang.Object getLastSelectedPathComponent();
public javax.swing.tree.TreePath getSelectionPath();
和其他
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类似这样：
class MyTree extends JTree

覆盖方法：
protected void fireValueChanged(TreeSelectionEvent e)

获取节点内容：

DefaultMutableTreeNode node = (DefaultMutableTreeNode) (this.getLastSelectedPathComponent());
Object obj = node.getUserObject();
if (obj instanceof Project) {
Project project = (Project)obj;
} else if (obj instanceof Server) {
Server tmpServer = (Server) obj;
} else {
}


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Java code

tree.addTreeSelectionListener(new TreeSelectionListener() {
    public void valueChanged(TreeSelectionEvent evt) {
        // Get all nodes whose selection status has changed
        TreePath[] paths = evt.getPaths();

        // Iterate through all affected nodes
        for (int i=0; i<paths.length; i++) {
            if (evt.isAddedPath(i)) {
                // This node has been selected
            } else {
                // This node has been deselected
            }
        }
    }
});