Hi Friend,

Try the following code:

import javax.swing.*;
import java.util.regex.*;

public class ValidateJOptionPane {
public static void main(String[] args) {
String input =JOptionPane.showInputDialog("Enter number: ");
Pattern p = Pattern.compile("[A-Z,a-z,&%$#@!()*^]");
Matcher m = p.matcher(input);
if (m.find()) {
JOptionPane.showMessageDialog(null, "Please enter only numbers");
}
}
}

Thanks