public LayoutWindow() {
    JLabel lblNewLabel = new JLabel("Receipt No:");
    txtReceiptNo = new JTextField();
    txtReceiptNo.setColumns(10);
    JLabel lblDate = new JLabel("Date:");
    txtDate = new JTextField();
    txtDate.setColumns(10);
    Date date = new Date();
    SimpleDateFormat dateFormate = new SimpleDateFormat("dd-MM-yyyy");
    String newDate = dateFormate.format(date);
    txtDate.setText(newDate);
    JLabel lblProductCode = new JLabel("Product Code");
    txtProductCode = new JTextField();
    txtProductCode.setColumns(10);
    String a = txtProductCode.getText();
    txtProductCode.getDocument().addDocumentListener(new DocumentListener() {
      public void changedUpdate(DocumentEvent e) {
        warn();
      }
      public void removeUpdate(DocumentEvent e) {
        warn();
      }
      public void insertUpdate(DocumentEvent e) {
        warn();
      }
      public void warn() {
         System.out.println("changed....");
         txtQuantity.setText("1");
      }
    });
    JLabel lblQuantity = new JLabel("Quantity");
    txtQuantity = new JTextField();
    txtQuantity.setColumns(10);
    JLabel lblPrice = new JLabel("Price");
    txtPrice = new JTextField();
    txtPrice.setColumns(10);
    JLabel lblNetAmount = new JLabel("Net Amount");
    txtNetAmount = new JTextField();
    txtNetAmount.setColumns(10);
    JLabel lblDiscount = new JLabel("Discount");
    txtDiscount = new JTextField();
    txtDiscount.setColumns(10);
    JLabel lblTotal = new JLabel("Total");
    txtTotal = new JTextField();
    txtTotal.setColumns(10);
    System.out.println(a);
    String[] columnNames = {"Product Code","Description","Price","Quantity","Total"};
    Object[][] data = {{a, "bb","cc", new Integer(5), new Boolean(false)},};
    final JTable table = new JTable(data, columnNames);
    table.setPreferredScrollableViewportSize(new Dimension(500, 70));
    table.setFillsViewportHeight(true);
    if (DEBUG) {
        table.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                printDebugData(table);
            }
        });
    }
    //Create the scroll pane and add the table to it.
    JScrollPane scrollPane = new JScrollPane(table);
上記のようなコードがあります。Jtextfield から取得した Jtable にデータを挿入したいと考えています。また、 JtextField data もクリアしたいと思いますonFocus。どうやってやるの?すぐに助けてください...ありがとう...