急:如何实现一个JTree中的结点点击后，调用不同不同的panal

[wawa_200]

如上！最好有代码解释

[snoopyfish]

建立一个JPanel，定义它的布局为CardLayout，将其它需要调用的panel添加到该面板中，注意添加的时候使用add(panel1,"card1"），这样card1就代表panel1。然后给jtree添加事件。如下：

private void jTree1ValueChanged(javax.swing.event.TreeSelectionEvent evt) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode)jTree1.getLastSelectedPathComponent();
if(node.toString().equals("1")) {
((CardLayout)cardPanel.getLayout()).show(cardPanel, "card1");
cardPanel.validate();
}
else if(node.toString().equals("2")){

((CardLayout)cardPanel.getLayout()).show(cardPanel, "card2");
cardPanel.validate();

}
else if(node.toString().equals("3")){

((CardLayout)cardPanel.getLayout()).show(cardPanel, "card3");
cardPanel.validate();

}
}

[leon_xiao]

先定义一个 XXXNode.getPanel();

listener = new TreeSelectionListener(){
public void valueChanged(TreeSelectionEvent e){
DefaultMutableTreeNode node = (DefaultMutableTreeNode)e.getPath.getLastSelectedPathComponent();
((XXXNode)node.getUserObject()).getPanel().show();
}


theTree.addTreeSelectionListener(listerner);