A JTextArea is a subclass of JTextComponent class and it is a multi-line text component to display the text or allow a user to enter the text. A JTextArea can generate a CaretListener interface when we are trying to implement the functionality of the JTextArea. By default, a JTextarea allows the orientation from left to right, if the user wants to enter a text from right to left by using the setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT) method of JTextArea class.
Example
import java.awt.*; import javax.swing.event.*; import javax.swing.*; public class JTextAreaOrientationTest extends JFrame { private JTextArea textArea; public JTextAreaOrientationTest() { setTitle("JTextAreaOrientation Test"); textArea = new JTextArea(); textArea.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT); add(new JScrollPane(textArea), BorderLayout.CENTER); setSize(400, 275); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } public static void main(String args[]) { new JTextAreaOrientationTest(); } }