文本字段和键绑定

Question

我的textField在textField.setBounds(27, 60, 150, 25)时可见，但我想在textField.setBounds(27, 120, 150, 25)时看到它。如何将textField放在JTable上（悬停在JTable之上）并且仍然可见？

这是我的代码：

import java.awt.EventQueue;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumnModel;
import javax.swing.JLabel;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import javax.swing.SwingConstants;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import java.awt.Color;

public class Fpos extends JFrame 
{
    private JTextField textField;
    public static void main(String[] args) 
    {
        EventQueue.invokeLater(new Runnable() 
        {
            public void run() 
            {
                try 
                {
                    Fpos frame = new Fpos();
                    frame.setVisible(true);
                    frame.setLocationRelativeTo(null);  //make frame center of screen                   
                } catch (Exception e) {e.printStackTrace();}
            }
        });
    }

    public Fpos() 
    {
        //create Jpanel
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(10, 10, 1300, 700);
        JPanel contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
        //create label TOTAL
        JLabel lbl1 = new JLabel("TOTAL : Rp.");                
        lbl1.setBounds(33, 25, 312, 31);
        lbl1.setFont(new Font("Wide Latin", Font.PLAIN, 30));
        contentPane.add(lbl1);
        //create label Total Amount
        JLabel lblTotal = new JLabel("123,456,789");
        lblTotal.setBounds(583, 19, 659, 61);
        lblTotal.setHorizontalAlignment(SwingConstants.RIGHT);
        lblTotal.setFont(new Font("Wide Latin", Font.PLAIN, 60));
        contentPane.add(lblTotal);
        //create jtable in scrollpane
        String[] columnNames = {"PLU", "NAME", "UOM", "QTY", "PRICE","AMOUNT"};
            Object[][] data = {{"", "", "", "", "", ""}};
             DefaultTableModel model = new DefaultTableModel(data, columnNames);
         JTable table = new JTable(model);                  
         table.setFont(new Font("Tahoma", Font.PLAIN, 20));
         table.setRowHeight(25);
         JScrollPane sp=new JScrollPane(table);
         sp.setBounds(25, 100, 1240, 556);
         contentPane.add(sp);
         //set column width
         TableColumnModel columnModel = table.getColumnModel();
         short a[] = {150,540,50,150,150,200};
         for(byte i=0;i<6;i++) { columnModel.getColumn(i).setPreferredWidth(a[i]); }
        //virtual table cell editor
         textField = new JTextField();       
         textField.setBackground(Color.CYAN);
         textField.setBounds(27, 60, 150, 25);       
         contentPane.add(textField);                         
         textField.requestFocus();
         //keybinding bound to texField starting here
         //keybinding for enter key
        Action enter = new AbstractAction() 
        {
            @Override
            public void actionPerformed(ActionEvent e) 
            {
                /* It'll be quite lot of code here later, let me summarize them:
                 * 1. query from database with textfield value
                 * 2. setvalue table from resultset
                 * 3. sum all value from column 5 and set its value to lblTotal
                 * 4. adding row 
                 * 5. move textfield over new row column 0 of the jtable (new item is ready for input by barcode scanner again)
                 */  
                //add new blank row at last row
                 model.addRow(data);
                 model.setValueAt("", model.getRowCount()-1, 0);
            }
        };
        textField.getInputMap().put(KeyStroke.getKeyStroke((char) KeyEvent.VK_ENTER), "enter");
        textField.getActionMap().put("enter", enter);
         //keybinding for up key
        Action up = new AbstractAction() 
        {
            @Override
            public void actionPerformed(ActionEvent e) 
            {
                //move textfield to row-1 column  0
            }
        };
        textField.getInputMap().put(KeyStroke.getKeyStroke((char) KeyEvent.VK_UP), "up");
        textField.getActionMap().put("up", up);
         //keybinding for down key
        Action down = new AbstractAction() 
        {
            @Override
            public void actionPerformed(ActionEvent e) 
            {
                //move textfield to row+1 column  0 
            }
        };
        textField.getInputMap().put(KeyStroke.getKeyStroke((char) KeyEvent.VK_DOWN), "down");
        textField.getActionMap().put("down", down);
        //keybinding for F3 key
        Action  f3 = new AbstractAction() 
        {
            @Override
            public void actionPerformed(ActionEvent e) 
            {
                //delete current row (delete item) and recalculate for lblTotal
            }
        };
        textField.getInputMap().put(KeyStroke.getKeyStroke((char) KeyEvent.VK_ESCAPE), "f3");
        textField.getActionMap().put("f3", f3); 
        //keybinding for F1 key, show new frame/jpane for cashier search item by name when item code (textfield) not available 
        //keybinding for F9 key, show new frame/jpane for payment method whether cash or card
        //keybinding for F7 key, show new frame/jpane for reprint history transaction by input transaction id (with new textfield)          
    }
}