Penjumlahan Array 1 dimensi pada JAVA

import java.util.Scanner;
class hihi{
private static Scanner input;
public static void main(String[]args){
int a,n,jml_nil=0;
double nil_rata=0;
int[]nilai;
nilai=new int[10];

input=new Scanner(System.in);
System.out.print("Masukkan banyak data =  ");
n=input.nextInt();
System.out.println(" ");
for(a=0;a<n;a++){
System.out.print("Masukkan array ke"+a+"=");
nilai[a]=input.nextInt();}

System.out.println("\n\nData yang diinputkan ke elemen array\n");
for(a=0;a<n;a++){
System.out.print("\nNilai ke - "+a);
System.out.print("="+nilai[a]);
jml_nil=jml_nil+nilai[a];
}
nil_rata=jml_nil/n;
System.out.println("\n----------------");
System.out.println("Jumlah array nilai "+jml_nil);
System.out.println("Nilai rata-rata array nilai ="+nil_rata);
}
}


source : http://www.ngejava.com