Solved: javafx change text size

change text size In today’s digital world, having a user-friendly and accessible website is a necessity. One essential feature that contributes to the overall user experience is the ability to change text size on a webpage. In this article, we will explore how to implement this functionality using Java programming, alongside delving into the intricacies of SEO and positioning. Additionally, we will discuss some of the popular libraries and functions involved in accomplishing this task. So, without further ado, let’s dive in!

Introduction to text resizing

Changing text size is an indispensable part of web accessibility, enabling people with visual impairments to comfortably read and interact with the content. Implementation of this feature can be performed using various programming languages, including Java, which boasts extensive libraries for manipulating text.

In the following sections, we will discuss the solution to implement text resizing using Java and provide a step-by-step explanation of the code. Moreover, we will highlight some related libraries and functions involved in solving this issue or similar problems.

Solution to text resizing

To change the text size in a Java application, we will use the Swing library. Swing is a widely-used library in Java applications that provides an extensive range of graphical interface components, including buttons, checkboxes, and text areas.

First, let’s establish a basic framework for a Java Swing application. In this context, we will create a window with buttons and a text area, allowing users to increase or decrease the font size.

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TextSizeApplication {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> createAndShowGUI());

    private static void createAndShowGUI() {
        JFrame frame = new JFrame("Text Size Changer");
        frame.setSize(400, 300);

        JButton increaseButton = new JButton("Increase Size");
        JButton decreaseButton = new JButton("Decrease Size");
        JTextArea textArea = new JTextArea();

        increaseButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Font currentFont = textArea.getFont();
                float newSize = currentFont.getSize() + 2.0f;

        decreaseButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Font currentFont = textArea.getFont();
                float newSize = currentFont.getSize() - 2.0f;

        frame.getContentPane().add(increaseButton, BorderLayout.NORTH);
        frame.getContentPane().add(decreaseButton, BorderLayout.SOUTH);
        frame.getContentPane().add(textArea, BorderLayout.CENTER);


This code snippet employs the JTextArea class to create a text area that can easily be resized. The increaseButton and decreaseButton are connected to listeners, which respond to user clicks by changing the font size of the text area in increments or decrements.

Java Swing Library and other related functions

The Java Swing library is an essential toolkit in Java for creating graphical user interfaces. Some of the most commonly used classes in Swing include JFrame, JButton, and JTextArea. Additionally, Swing offers a vast collection of layout managers, event listeners, and customization options to provide a comprehensive solution for implementing GUIs.

Apart from Java Swing, other libraries, such as JavaFX, offer the possibility to construct rich user interfaces for desktop applications with varied text manipulation methods. JavaFX serves as a strong alternative to Java Swing, providing better performance, modern styling options, and superior support for graphics rendering.

In conclusion, adapting text size in a web application contributes significantly to web accessibility and user experience. Java, with its robust libraries like Swing and JavaFX, provides the essential tools to resize text and create dynamic graphics interfaces. By understanding the code structure and incorporating relevant libraries and functions, developers can deliver an inclusive and visually appealing experience for users across diverse digital platforms.

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