Java Project Tutorial - How to Create a Custom Table and Scrollbars Using Graphics In Java NetBeans

Custom Table with Scrollable Rows Design In Java NetBeans
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In this Java Tutorial we will see How To Create a Custom Table With a Modern Design and alternating row colors and Custom Scrollbar Using Graphics and Graphics2D In Netbeans.
In the second table we will be creating a custom table with data fetched from a MySQL database.
What We Will Use To Build This Project ? :
- Java Programming Language.
- NetBeans Editor.
Java Swing Components We Will Use In This Java Tutorial:
- JFrame.
- JPanel.
- JButton.
- JScrollBar.
- JScrollPane.
- BasicScrollBarUI.
What We Will Do In This Project ? :
- Use Graphics2D object to draw table headers and rows with alternating row colors.
- Create a custom scrollbar UI (ModernScrollBarUI) for the vertical scrollbar.
- The application fetches data from a MySQL database table named "product" and displays it in a customized table format.
- Connects to a MySQL database using JDBC, executes a SELECT query on the "product" table.
- Retrieve data from a MySQL database table and display it in a customized table.
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▶ 00:00:00 The Project Overview
▶ 00:01:00 Create The Project File
▶ 00:01:50 Create and Design The Form
▶ 00:06:15 Create a TableRow class.
▶ 00:10:20 Create a TablePanel class that extends JPanel and is responsible for drawing the table.
▶ 00:12:50 Method to draw table.
▶ 00:26:25 Create a Custom BasicScrollBarUI to customize the appearance of the scrollbar.
▶ 00:53:40 Create another custom table with different colors.
▶ 00:56:50 Create another custom table to display data from mysql database.
▶ 01:01:05 Create a function to fetch data from mysql database.
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[@sulevanG]

Hi i really needed your help. Can you make a video about how to make a jtable with disabled duplicate entry? For example when i put James in the jtable i shouldn't be able to put another one. Only limit it in 1?

[@1BestCsharpblog]

import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashSet;
public class UniqueEntryJTableDemo extends JFrame {
private JTable table;
private DefaultTableModel model;
private JTextField textField;
private HashSet uniqueEntries;
public UniqueEntryJTableDemo() {
setTitle("Unique Entry JTable");
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(400, 300);
// Initialize HashSet to store unique entries
uniqueEntries = new HashSet();
// Create table model
model = new DefaultTableModel();
model.addColumn("Name");
// Create JTable with the model
table = new JTable(model);
// Create JTextField for input
textField = new JTextField(20);
// Create JButton to add entry
JButton addButton = new JButton("Add");
addButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
addEntry();
}
});
// Create JPanel for input components
JPanel inputPanel = new JPanel();
inputPanel.add(textField);
inputPanel.add(addButton);
// Add components to JFrame
add(new JScrollPane(table), BorderLayout.CENTER);
add(inputPanel, BorderLayout.SOUTH);
}
private void addEntry() {
String entry = textField.getText().trim();
if (!entry.isEmpty() && !uniqueEntries.contains(entry)) {
uniqueEntries.add(entry); // Add to HashSet
model.addRow(new Object[]{entry}); // Add to JTable
textField.setText(""); // Clear text field
} else {
JOptionPane.showMessageDialog(this, "Duplicate entry or empty string!", "Error", JOptionPane.ERROR_MESSAGE);
}
}
public static void main(String[] args) {
new UniqueEntryJTableDemo().setVisible(true);
}
}