Thread: Remove extra letters from the end of the text

this is my code

create a class name "NumberToPersianWords"

 
package ClasAndMain;
 
public class NumberToPersianWords {
 
    private static final String[] ONES = {"", "یک", "دو", "سه", "چهار", "پنج", "شش", "هفت", "هشت", "نه", "ده",
        "یازده", "دوازده", "سیزده", "چهارده", "پانزده", "شانزده", "هفده", "هجده", "نوزده"};
 
    private static final String[] TENS = {"", "ده", "بیست", "سی", "چهل", "پنجاه", "شصت", "هفتاد", "هشتاد", "نود"};
 
    private static final String[] HUNDREDS = {"", "صد", "دویست", "سیصد", "چهارصد", "پانصد", "ششصد", "هفتصد", "هشتصد", "نهصد"};
 
    private static final String[] ORDERS = {"", "هزار", "میلیون", "میلیارد", "بیلیون", "بیلیارد", "تریلیون", "تریلیارد", "کوآدریلیون", "کادریلیارد", "کوینتیلیون", "کوانتینیارد", "سکستیلیون", "سکستیلیارد", "سپتیلیون", "سپتیلیارد", "اکتیلیون", "اکتیلیارد", "نانیلیون", "نانیلیارد"};
 
    public static String convertToWords(long number) {
        if (number == 0) {
            return "صفر";
        }
 
        if (number < 0) {
            return "منفی " + convertToWords(Math.abs(number));
        }
 
        String words = "";
 
        int orderIndex = 0;
 
        while (number > 0) {
            long currentNumber = number % 1000;
 
            String currentWords = "";
 
            int hundredsDigit = (int) currentNumber / 100;
            if (hundredsDigit > 0) {
                currentWords += HUNDREDS[hundredsDigit] + " و ";
            }
 
            int tensDigit = (int) (currentNumber % 100) / 10;
            if (tensDigit > 1) {
                currentWords += TENS[tensDigit] + " و ";
            }
 
            // Add a separate string for the 'and' before ten and add it to the final word
            String separateAndForTens = "";
            if (tensDigit == 1) {
                separateAndForTens = "و";
            }
 
            int onesDigit = (int) currentNumber % 10;
            if (tensDigit == 1 || onesDigit > 0) {
                if (tensDigit == 1) {
                    currentWords += ONES[(int) (currentNumber % 100)];
                } else {
                    currentWords += ONES[onesDigit];
                }
            }
 
            if (currentNumber > 0) {
                currentWords += " " + ORDERS[orderIndex] + " ";
            }
 
            // Add an 'and' before the first and last digits if needed
            if (orderIndex == 0 && tensDigit > 0 && onesDigit > 0) {
                words = separateAndForTens + words;
            }
            if (orderIndex > 0 && onesDigit > 0) {
                int digitsCount = (int) Math.log10(currentNumber) + 1;
                if (digitsCount >= 3) {
                    char lastDigit = String.valueOf(currentNumber).charAt(digitsCount - 1);
                    if (lastDigit != '0') {
                        currentWords = "و " + currentWords;
                    }
                }
            }
 
            // Add an 'and' between numbers
            if (orderIndex > 0 && words.trim().length() > 0) {
                String lastWord = words.substring(words.lastIndexOf(" ") + 1);
                if (!lastWord.equals("و")) {
                    words = words.trim() + " و ";
                }
            }
 
            words = currentWords + words;
 
            orderIndex++;
            number = number / 1000;
        }
 
        // Add an 'and' before the last number if needed
        if(words.lastIndexOf("و") != words.length() - 1) {
            words = words + " و";
        }
 
 
        return words.trim();
    }
 
    public static boolean isPositiveNumber(String s) {
        try {
            long number = Long.parseLong(s);
            return number >= 0;
        } catch (NumberFormatException e) {
            return false;
        }
    }
 
}

and a class for use PersianNumberConverter

 
package ClasAndMain;
 
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
 
public class PersianNumberConverter {
 
    public static void main(String[] args) {
        JFrame frame = new JFrame("تبدیل اعداد به حروف فارسی");
        JPanel panel = new JPanel(new BorderLayout());
        JTextField textField = new JTextField(20);
        JButton button = new JButton("تبدیل به حروف");
        JLabel label = new JLabel();
 
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String text = textField.getText();
                if (NumberToPersianWords.isPositiveNumber(text)) {
                    long number = Long.parseLong(text);
                    String words = NumberToPersianWords.convertToWords(number);
 
 
 
 
                    label.setText(words);
 
                } else {
                    label.setText("لطفا یک عدد مثبت وارد کنید");
                }
            }
        });
 
        textField.addKeyListener(new KeyListener() {
            @Override
            public void keyTyped(KeyEvent e) {
                char c = e.getKeyChar();
                if (!Character.isDigit(c)) {
                    e.consume();
                }
            }
 
            @Override
            public void keyPressed(KeyEvent e) {
 
            }
 
            @Override
            public void keyReleased(KeyEvent e) {
 
            }
        });
 
        panel.add(textField, BorderLayout.NORTH);
        panel.add(button, BorderLayout.CENTER);
        panel.add(label, BorderLayout.SOUTH);
 
        frame.getContentPane().add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
 
}

now The problem is that after the last number, it records the letter " و" several times, which should not be written after the last number
please help me for fix that bug