ช่วยแนะนำตัวอย่างการเขียนโปรแกรมเพื่ออ่านค่าผ่านทางคีย์บอร์ด

import java.io.*;
class SumAverage {
  public static void main(String args[]) throws IOException {
    BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    String buf;
    int  i1,i2,i3,i4,i5,i6,i7;
    buf = stdin.readLine();
    i1 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i2 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i3 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i4 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i5 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i6 = Integer.parseInt(buf);
    buf = stdin.readLine();
    i7 = (i1 + i2 + i3 + i4 + i5 + i6)/6;
    System.out.println("Average is  = "+i7);
  }
}