swing - 将 JTable 中的数据显示到 TextArea

Question

How can i display a data from a 'specific column' of JTable when a row is selected (table.getvalue(table.getValueAt(table.getSelectedRow(),'specific column'))into a Textarea. is there any Listener to make这项工作？我的意思是在每次选择中都必须更新 textarea 并获取选择行的特定列的值。

Answer 1

MouseListener在表中添加一个。当用户选择单元格时，只需获取数据并将文本设置为TextField. 您可以通过运行以下代码来查看演示。

private void createUI() {
        JFrame frame = new JFrame();

        frame.setLayout(new BorderLayout());

        Object[][] data = {{"a", "b"}, {"c", "d"}, {"e", "f"}};
        Object[] columnNames = {"Col-1", "Col-2"};

        final JTable table = new JTable(data, columnNames);

        JPanel btnPnl = new JPanel(new FlowLayout(FlowLayout.LEFT));
        btnPnl.add(new JLabel("Selected Value: "));
        final JTextField text = new JTextField(10);
        btnPnl.add(text);
        table.getTableHeader().setReorderingAllowed(false);

        table.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {

                if(table.getSelectedRow() != -1 && table.getSelectedColumn() != -1) {
                    String selData = table.getValueAt(table.getSelectedRow(), table.getSelectedColumn()).toString();
                    text.setText(selData);
                }
            }
        });

        frame.add(table.getTableHeader(), BorderLayout.NORTH);
        frame.add(table, BorderLayout.CENTER);
        frame.add(btnPnl, BorderLayout.SOUTH);
        frame.setTitle("Table to TextField Example.");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }