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Lab Activity 2 Equation

The document provides a simple Java program that creates a GUI using Swing, featuring a label, text field, button, and text area. It explains the components used, such as JFrame, JPanel, JLabel, JTextField, JButton, and JTextArea, along with their functionalities. Additionally, it includes instructions on how to run the program after copying the code into a file named SimpleGuiApp.java.

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Gemeda Abugare
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5 views4 pages

Lab Activity 2 Equation

The document provides a simple Java program that creates a GUI using Swing, featuring a label, text field, button, and text area. It explains the components used, such as JFrame, JPanel, JLabel, JTextField, JButton, and JTextArea, along with their functionalities. Additionally, it includes instructions on how to run the program after copying the code into a file named SimpleGuiApp.java.

Uploaded by

Gemeda Abugare
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 4

Sure! Below is an example of a simple Java program that creates a GUI using Swing.

This program will


display a window with a label, text field, button, and a text area, which is a common layout for basic
applications.

▎Java Program

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class SimpleGuiApp {

public static void main(String[] args) {

// Create the frame

JFrame frame = new JFrame("Simple GUI Example");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(400, 300);

// Create a panel to hold components

JPanel panel = new JPanel();

panel.setLayout(new GridLayout(4, 1)); // Set layout to GridLayout with 4 rows and 1 column

// Create components

JLabel label = new JLabel("Enter your text:");

JTextField textField = new JTextField();

JButton button = new JButton("Submit");


JTextArea textArea = new JTextArea();

// Add action listener to the button

button.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent e) {

String inputText = textField.getText();

textArea.append(inputText + "\n"); // Append the input text to the text area

textField.setText(""); // Clear the text field after submission

});

// Add components to the panel

panel.add(label);

panel.add(textField);

panel.add(button);

panel.add(new JScrollPane(textArea)); // Add scroll pane for the text area

// Add panel to the frame

frame.add(panel);

// Set frame visibility

frame.setVisible(true);

}
▎Explanation of the Code:

• JFrame: This is the main window of the application.

• JPanel: A container that holds and organizes the components.

• JLabel: Displays a label prompting the user to enter text.

• JTextField: A single-line input field where users can type their text.

• JButton: A button that the user can click to submit their input.

• JTextArea: A multi-line area that displays submitted text. It is wrapped in a JScrollPane to allow
scrolling if the content exceeds the visible area.

• ActionListener: This interface is implemented to handle button clicks. When the button is clicked, it
retrieves the text from the JTextField, appends it to the JTextArea, and clears the JTextField.

▎How to Run the Program:

1. Make sure you have Java Development Kit (JDK) installed on your machine.

2. Copy the code into a file named SimpleGuiApp.java.


3. Open a terminal or command prompt and navigate to the directory where you saved the file.

4. Compile the program using:

javac SimpleGuiApp.java

5. Run the program using:

java SimpleGuiApp

This will open a GUI window where you can enter text, click the "Submit" button, and see your entered
text appear in the text area below.

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