Menampilkan Rata-Rata Menggunakan Applet

import java.applet.Applet;
import java.awt.Graphics;
import javax.swing.*;
public class rata extends Applet {
double rat;
    public void init() {
      String n,m;
     
      double n1,n2,b=0;
      n = JOptionPane.showInputDialog("banyak data ");
      n1=Double.parseDouble(n);
     
      for (int i=0;i<n1;i++){
      m = JOptionPane.showInputDialog("masukkan bilangan");
      n2=Double.parseDouble(m);
     
      b=b+n2;
    
    }
       
        rat=b/n1;}
 public void paint(Graphics g)
    {
         g.drawString("rata"+rat,25,25);
 }

}