我知道这是一个简单而愚蠢的问题,因为我是新手,所以不知道如何链接。

我正在尝试获取node value(带有路径的文件),并使用JButton-“添加文件”将节点值推送到JTable中,到目前为止已经发布了代码,但并没有给出任何错误,但是没有执行我想要的操作,谢谢。

如何从一个函数到另一个函数获取节点值,谢谢

从JTree获取节点值

    File root = new File(System.getProperty("user.home"));
    FileTreeModel model = new FileTreeModel(root);
    JTree tree = new JTree(model);
    JScrollPane scrollpane = new JScrollPane(tree);
    scrollpane.setBounds(10, 9, 304, 730);
    frmViperManufacturingRecord.getContentPane().add(scrollpane);


    tree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent e) {
            File node = (File)e.getPath().getLastPathComponent();
            //System.out.println("You selected " + node);
            if (!node.isFile()) {
                JFrame frame = new JFrame();
                JOptionPane.showConfirmDialog(frame, "Please select the valid file to Add Files", "Not Valid File",JOptionPane.PLAIN_MESSAGE );
                //if (result == JOptionPane.CANCEL_OPTION);
            }
            //else
        }
    });


尝试将节点值推入JTable

    //table just below Add Files button
    table_2 = new JTable();
    table_2.setBounds(324, 43, 713, 121);
    frmViperManufacturingRecord.getContentPane().add(table_2);


使用JButton

    // Add files button
    JButton btnAddFiles_1 = new JButton("Add Files");
    btnAddFiles_1.setMnemonic('A');
    btnAddFiles_1.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
            Object rowData[][] = { { "01.", node, }};
            Object columnNames[] = { "Sl.no", "File name"};
            JTable table = new JTable(rowData, columnNames);
        }
    });
    btnAddFiles_1.setFont(new Font("Calibri", Font.BOLD, 12));
    btnAddFiles_1.setBounds(324, 9, 89, 23);
    frmViperManufacturingRecord.getContentPane().add(btnAddFiles_1);

最佳答案

这里:

btnAddFiles_1.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent ae) {
        Object rowData[][] = { { "01.", node, }};
        Object columnNames[] = { "Sl.no", "File name"};
        JTable table = new JTable(rowData, columnNames); // new JTable that is not placed in the content pane
   }
});


不要重新创建表本身,因为已经创建并放置了table_2。而是更新其表模型。例如:

btnAddFiles_1.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent ae) {
        Object rowData[][] = { { "01.", node, }};
        Object columnNames[] = { "Sl.no", "File name"};
        table_2.setModel(new DefaultTableModel(rowData, columnNames));
   }
});




旁注

关于这条线:

table_2.setBounds(324, 43, 713, 121);


Swing被设计为与LayoutManagers一起使用,不建议使用诸如setBounds(...)setLocation(...)setXxxSize(...)之类的方法。见Laying Out Components Within a Container

另外(感谢@mKorbel的评论):

frmViperManufacturingRecord.getContentPane().add(table_2);


表格应该放在JScrollPane中,就像您的树一样:

JScrollPane scrollPane = new JScrollPane(table_2);
frmViperManufacturingRecord.getContentPane().add(scrollPane);

09-25 22:05