單擊樹時如何從 JTree 獲取節點路徑？

Question

我有幾個節點的樹，還為此創建了一個樹監聽器，現在我需要在單擊它時獲取特定的節點路徑，我已經嘗試過這段代碼但沒有得到准確的輸出有人可以幫助我嗎？

public class FTListener implements TreeSelectionListener {


    @Override
    public void valueChanged(TreeSelectionEvent e) {
        TreePath[] tree=new TreePath[e.getNewLeadSelectionPath().getPathCount()];
        int i=0;

        tree=e.getPaths();

        for(TreePath tr:tree){
            System.out.println(tree[i]);
        i++;}

        //getPath() returns the array elements so i'm here using 
    //for loop for printing each elements.

這是輸出

[/Desktop, /home/user/Desktop, /home/user/Desktop/1302677132563_USER_MANUAL_SMS_BANKING.pdf]
[/Desktop, /home/user/Desktop, /home/user/Desktop/Lab090C .java~]

Answer 1

做這個

public void valueChanged(TreeSelectionEvent e) {

    DefaultMutableTreeNode node = (DefaultMutableTreeNode)
                       tree.getLastSelectedPathComponent();

    if (node == null) {
    //since Nothing is selected.     
     return;
    }

    Object nodeObject = node.getUserObject();
    System.out.println("Selected node : " + nodeObject);
}

如果您只想單選，請添加此選項

tree.getSelectionModel().setSelectionMode
        (TreeSelectionModel.SINGLE_TREE_SELECTION);