Java Programming

import javax.swing.*;
import java.text.*;

public class Integer
{
    public static void main (String[] args)
    {
        String numberStr, number2Str;
        int number = 0, number2 = 0;
        
        while(number < 1)
        {
            numberStr = JOptionPane.showInputDialog(null,"Enter Integer 1");
            try
            {
                number = Integer.parseInt(numberStr);
            }
            catch(NumberFormatException e)
            {
                JOptionPane.showMessageDialog(null,"Input Error!");
            }
        }
        
        number2 = Integer.parseInt(JOptionPane.showInputDialog(null,"Enter number of powers(0-3)"));
        while(number2<1 || number2>3)
        {
            number2 = Integer.parseInt(JOptionPane.showInputDialog(null,"Enter number of powers(0-3)"));
        }
        

    }
}

Now can someone tell me whats wrong with it??
It says something about the line: number = Integer.parseInt(numberStr);

saying cannot resolve symbol - parseInt or something????
Thanks