Java – how to set the direction of jtextarea from right to left (in joptionpane)

I have JScrollPane and jtextarea. I try to set the direction of jtextarea from right to left, so the text will start from the right and the scroll bar will be on the left

I tried the following methods, but did not affect the direction:

txt.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
txt.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
txt.setAlignmentX(JTextArea.RIGHT_ALIGNMENT);

Edit:

Two answers camickr & spam offers work well, but not in my program. I use my jtextarea as an object message and pass it to optionpane

EDIT2：

I came up with setcomponentorientation (componentorientation. Right_to_left); It doesn't work if I apply it to joptionpane content Is there an alternative solution to this problem?

Similar to my code:

import java.awt.*;
import java.util.*;
import javax.swing.*;
public class TextArea extends JPanel
{
    private JTextArea txt = new JTextArea();
    public TextArea()
    {
        setLayout(new GridLayout());
        txt.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        JScrollPane scroll = new JScrollPane(txt);
        scroll.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        setPreferredSize(new Dimension(200,200));
        this.add(scroll);
    }
    private void display()
    {
        Object[] options = {this};
        JOptionPane pane = new JOptionPane();
        int option = pane.showOptionDialog(null,null,"Title",JOptionPane.DEFAULT_OPTION,JOptionPane.PLAIN_MESSAGE,options,options[0]);
    }
    public static void main(String[] args)
    {
        new TextArea().display();
    }
}

Solution

scrollPane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);

textArea.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);

The text starts on the right, but is still appended to the end when entering, rather than the beginning of the inserted line

to update:

I don't know why it doesn't work in the options pane This is a simple solution:

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

public class Test
{
    public static void main(String args[]) throws Exception
    {
        SwingUtilities.invokelater(new Runnable() {
            public void run() {
                JTextArea textArea = new JTextArea(4,20);
                JScrollPane scrollPane = new JScrollPane( textArea );
                JPanel panel = new JPanel();
                panel.add( scrollPane );

                scrollPane.addAncestorListener( new AncestorListener()
                {
                    public void ancestorAdded(AncestorEvent e)
                    {
                        JScrollPane scrollPane = (JScrollPane)e.getComponent();
                        scrollPane.applyComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
                    }

                    public void ancestorMoved(AncestorEvent e) {}
                    public void ancestorRemoved(AncestorEvent e) {}
                });

                JOptionPane.showMessageDialog(null,panel);
            }
        });
    }
}