Question

i am new to Stack overflow and looking for some help on a java app i have been working on at college.

My questions is, how do I insert an integer from a Jtextfield (in external class) into a Jtable using a button action listener event.

My code is:

External class Button Code to insert a jtextfield integer to the table

   package banknew;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;



public class CheckingAccount extends BANKNEW
{

final JButton DepositAmount = new JButton("Deposit");  
final JTextField tAmount = new JTextField();

    public void CheckingAccount() {
        String title = "Checking Account";
        JFrame checkingAccount = new JFrame(title);

        checkingAccount.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        checkingAccount.setSize(400, 200);
        checkingAccount.setLocation(checkingAccount.getHeight() / 2, checkingAccount.getWidth() / 2);

        final JLabel error = new JLabel("");
        checkingAccount.add(error, BorderLayout.SOUTH);
        error.setVisible(true);
        error.setLocation(5, 600);


        JMenuItem file1 = new JMenuItem("Checking Account");
        JMenuItem file2 = new JMenuItem("Checking Accounts");
        JMenuItem file3 = new JMenuItem("Checking Accounts");
        JMenuItem file4 = new JMenuItem("Bank Account");
        JMenuItem file5 = new JMenuItem("Close");



        JMenu filemenu = new JMenu("File");
        filemenu.add(file1);
        filemenu.add(file2);
        filemenu.add(file3);
        filemenu.addSeparator();
        filemenu.add(file4);
        filemenu.addSeparator();
        filemenu.add(file5);

        JMenuBar menubar = new JMenuBar();
        menubar.add(filemenu);
        checkingAccount.setJMenuBar(menubar);
        BorderLayout border = new BorderLayout();
        filemenu.setLayout(border);
        checkingAccount.setVisible(true);





        /**
         * ****************************************
         * Create Second JPanel - Buttons & ComboBox .
 *****************************************
         */
        JPanel abuttons1 = new JPanel();
        checkingAccount.add(abuttons1);
        //abuttons1.setBorder(javax.swing.BorderFactory.createEtchedBorder());
        abuttons1.setBorder(BorderFactory.createTitledBorder(""));

        JButton Withdraw = new JButton("Withdraw");
        JLabel transBankName1 = new JLabel("Account Name:");
        JLabel transAmount = new JLabel("Amount:");


        final JTextField tBankName1 = new JTextField(20);
        final JComboBox AccountName = new JComboBox();
        AccountName.setEditable(false);
        AccountName.setMaximumSize(new java.awt.Dimension(100, 20));
        AccountName.setBorder(javax.swing.BorderFactory.createEtchedBorder());

        transBankName1.setMaximumSize(new java.awt.Dimension(100, 20));
        transAmount.setMaximumSize(new java.awt.Dimension(100, 20));
        tAmount.setMaximumSize(new java.awt.Dimension(100, 20));
        tBankName1.setMaximumSize(new java.awt.Dimension(00, 20));

        abuttons1.setLayout(new GridLayout(5, 1, 5, 5));
        abuttons1.add(transBankName1);
        abuttons1.add(AccountName);
        abuttons1.add(transAmount);
        abuttons1.add(tAmount);

        abuttons1.add(Withdraw);
        abuttons1.add(DepositAmount);
        abuttons1.setLocation(0, 0);
        abuttons1.setSize(300,200);

         DepositAmount.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (table.getSelectedRow() > -1) {
                    // assuming from your code that you want to set the
                    // textfield's value at the table's selected row
                    try {
                        Integer amount = Integer.parseInt(tAmount.getText());
                        table.getModel().setValueAt(amount, table.getSelectedRow(), 4);
                    } catch (NumberFormatException nfe) {
                        // User did not provide a number.
                        // do nothing? show dialog? you name it!
                    }
                }
            }
        });
    }


    }

• The External class has a GUI with the Textfield and ‘Deposit’ Button.
• The Main Class has a GUI with a 5 column JTable

All i want to be able to do is have an external extended class with a Button, and on button click insert amount from local textfield into the main Jtable as shown in the code with the ‘abc’ table model.

I have searched google and stack overflow but most posts are related to SQL or database linkage.

If anyone can point me in the right direction, i would be very grateful.

Thanks

EDIT 2: Copy and paste the code and ill try and upload the main class, let me know once you have copied it…

Answer 1

Am a bit unsure of the more global setup of your classes.
But if the CheckingAccount is supposed to write to the table, it’ll need to be provided a reference to the table in its constructor.

public class CheckingAccount {
    final JButton depositAmount = new JButton("Deposit");  
    final JTextField tAmount = new JTextField();

    //Provide the JTable to the CheckingAccount when you construct it!
    public CheckingAccount(final JTable table) {
        depositAmountButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (table.getSelectedRow() > -1) {
                    // assuming from your code that you want to set the
                    // textfield's value at the table's selected row
                    try {
                        Integer amount = Integer.parseInt(textField.getText());
                        table.getModel().setValueAt(amount, table.getSelectedRow(), 4);
                    } catch (NumberFormatException nfe) {
                        // User did not provide a number.
                        // do nothing? show dialog? you name it!
                    }
                }
            }
        });
    }
}

To learn a bit more about how to use Swing, take a look at the Oracle tutorials