Explain the following swing components with an example program:i)JLabel ii)JTextField iii) JScrollPane iv) JTable

Explain the following swing components with an example program:
i)JLabel ii)JTextField iii) JScrollPane iv) JTable

Answer:-

Here’s a clear explanation of each Swing component you listed, along with a simple example program that uses all four components in a single GUI:

i) JLabel

• A display-only component used to show text or images.
• It cannot be edited by the user.

ii) JTextField

• A component that allows the user to enter a single line of text.

iii) JScrollPane

• A scrollable view of another component (like a panel, text area, or table).
• Adds horizontal and/or vertical scrollbars as needed.

iv) JTable

• A component used to display tabular data (rows and columns).
• Can be placed inside a JScrollPane for scrollable tables.

✅ Example Program: Using JLabel, JTextField, JScrollPane, JTable

import javax.swing.*;
import java.awt.*;

public class SwingComponentsExample {
    public static void main(String[] args) {
        // Create frame
        JFrame frame = new JFrame("Swing Components Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(500, 300);
        frame.setLayout(new FlowLayout());

        // JLabel
        JLabel label = new JLabel("Enter your name:");
        frame.add(label);

        // JTextField
        JTextField textField = new JTextField(20);
        frame.add(textField);

        // JTable with sample data
        String[][] data = {
            {"1", "Alice", "90"},
            {"2", "Bob", "85"},
            {"3", "Charlie", "88"},
        };
        String[] columnNames = {"ID", "Name", "Marks"};

        JTable table = new JTable(data, columnNames);

        // JScrollPane for the table
        JScrollPane scrollPane = new JScrollPane(table);
        scrollPane.setPreferredSize(new Dimension(400, 100));
        frame.add(scrollPane);

        // Show frame
        frame.setVisible(true);
    }
}

Explanation of Output

• A label prompting user input.
• A text field to type a name.
• A scrollable table showing ID, name, and marks of students.

Summary Table