JAVA Program to find average from 10 user input number

import java.io.*;
 public class avg
 {
 public static void main(String []args)throws IOException
 {
 double N1;
 double N2;
 double N3;
 double N4;
 double N5;
 double N6;
 double N7;
 double N8;
 double N9;
 double N10;
 double Average;
 System.out.println("Enter First Number :");
 N1=readDouble();
 System.out.println("Enter Second Number :");
 N2=readDouble();
 System.out.println("Enter Third Number :");
 N3=readDouble();
 System.out.println("Enter Fourth Number :");
 N4=readDouble();
 System.out.println("Enter Fifth Number :");
 N5=readDouble();
 System.out.println("Enter Sixth Number :");
 N6=readDouble();
 System.out.println("Enter Seventh Number :");
 N7=readDouble();
 System.out.println("Enter Eighth Number :");
 N8=readDouble();
 System.out.println("Enter Ninth Number :");
 N9=readDouble();
 System.out.println("Enter Tenth Number :");
 N10=readDouble();
 Average=(N1+N2+ N3+N4+N5+N6+N7+N8+N9+N10)/10;
 System.out.println("Average of given entered numbers is :"+Average);
 }
 public static Double readDouble()throws IOException
 {
 InputStreamReader isr=new InputStreamReader (System.in);
 BufferedReader br=new BufferedReader (isr);
 String tmp=br.readLine(); return(Double.parseDouble(tmp));
 }
 }