Introduction
The Java Swing is very important Programming skills nowadays as it helps Developer to develop Java Program with GUI.
This Java Swing Program helps to generate JTable. The user will add, update & delete the contents of the Table.
Java Program Code
Please find Java Program Code below –
package com.kw.sample;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;
public class KWJTableRowExample {
public static void main(String[] args) {
// Call method which helps to generate the table
generateJTable();
}
/**
* This method helps to generate Table with buttons like Add, Update, Delete
*/
public static void generateJTable() {
// create JFrame and JTable
JFrame frame = new JFrame();
final JTable table = new JTable();
// create a table model and set a Column Identifiers to this model
Object[] columns = { "Registration No.", "First Name", "Last Name",
"Age" };
final DefaultTableModel model = new DefaultTableModel();
model.setColumnIdentifiers(columns);
// set the model to the table
table.setModel(model);
// Change A JTable Background Color, Font Size, Font Color, Row Height
table.setBackground(Color.CYAN.brighter());
table.setForeground(Color.black);
Font font = new Font("", 1, 18);
table.setFont(font);
table.setRowHeight(30);
// create JTextFields to hold the value
final JTextField textId = new JTextField();
final JTextField textFname = new JTextField();
final JTextField textLname = new JTextField();
final JTextField textAge = new JTextField();
// create JButtons to add the action
JButton btnAdd = new JButton("Add");
JButton btnDelete = new JButton("Delete");
JButton btnUpdate = new JButton("Update");
textId.setBounds(20, 220, 100, 25);
textFname.setBounds(20, 250, 100, 25);
textLname.setBounds(20, 280, 100, 25);
textAge.setBounds(20, 310, 100, 25);
btnAdd.setBounds(150, 220, 100, 25);
btnUpdate.setBounds(150, 265, 100, 25);
btnDelete.setBounds(150, 310, 100, 25);
// create JScrollPane
JScrollPane pane = new JScrollPane(table);
pane.setBounds(0, 0, 880, 200);
frame.setLayout(null);
frame.add(pane);
// add JTextFields to the jframe
frame.add(textId);
frame.add(textFname);
frame.add(textLname);
frame.add(textAge);
// add JButtons to the jframe
frame.add(btnAdd);
frame.add(btnDelete);
frame.add(btnUpdate);
// create an array of objects to set the row data
final Object[] row = new Object[4];
// button add row - Clicked on Add Button
btnAdd.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
row[0] = textId.getText();
row[1] = textFname.getText();
row[2] = textLname.getText();
row[3] = textAge.getText();
// add row to the model
model.addRow(row);
}
});
// button remove row - Clicked on Delete Button
btnDelete.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// i = the index of the selected row
int i = table.getSelectedRow();
if (i >= 0) {
// remove a row from jtable
model.removeRow(i);
} else {
System.out
.println("There were issue while Deleting the Row(s).");
}
}
});
// get selected row data From table to textfields
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
// i = the index of the selected row
int i = table.getSelectedRow();
textId.setText(model.getValueAt(i, 0).toString());
textFname.setText(model.getValueAt(i, 1).toString());
textLname.setText(model.getValueAt(i, 2).toString());
textAge.setText(model.getValueAt(i, 3).toString());
}
});
// button update row - Clicked on Update Button
btnUpdate.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// i = the index of the selected row
int i = table.getSelectedRow();
if (i >= 0) {
model.setValueAt(textId.getText(), i, 0);
model.setValueAt(textFname.getText(), i, 1);
model.setValueAt(textLname.getText(), i, 2);
model.setValueAt(textAge.getText(), i, 3);
} else {
System.out.println("Update Error");
}
}
});
frame.setSize(900, 400);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
Program Output
- Launch the Java Program from eclipse
Once Java Program started then it navigates to a model window which contains Main area as well as buttons with the text boxes to add, update and delete the data.
- The user can enter the registration number, first name, last name & age and once clicked on ADD button then one row will be added in Main area.
The user added 3 records using the text boxes and Add button. There are no validations applied in this program so the developer can download this program and add validations to restrict duplicate records. The user can enter the registration number, first name, last name & age and once clicked on ADD button then one row will be added in Main area.
- The user can update the row data using the Update button. To update any specific row, the user has to click on the Row. Once the specific Row selected then it’s value will be populated on the TextBoxes to update and by clicking on the Update button values will be updated.
- The user can delete the specific row from the table. The user has to select the row which they want to delete from the table. Once clicked on the Delete button then the selected row will be deleted from the table and would not be recovered.
