Question

java树状图中先后点击两个根节点后再点击第一个根节点，而最终得到的是第二个根节点？

我该怎样获得鼠标所点击的根节点呢

Answer 1

下面这个程序或许会对你有帮助，
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.awt.event.*;
public class 处理树鼠标事件 extends JApplet {
public 处理树鼠标事件() {
JTree tree = new JTree();

getContentPane().add(new JScrollPane(tree));

tree.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent e) {
String s = null;
JTree t = (JTree)e.getSource();
int row = t.getRowForLocation(e.getX(), e.getY());

if(e.getClickCount() == 2)
s = "double click in row " + row;
else
s = "single click in row " + row;

if(row != -1) {
TreePath path = t.getPathForRow(row);
TreeNode node = (TreeNode)
path.getLastPathComponent();

s += ", node = " + node.toString();
}
showStatus(s);
}
});
}
}