Introduction

In this demo I have used NetBeans IDE 8.2 for debugging purpose. But you can use any java programming language compiler as per your availability..

import java.util.Arrays; 
 public class Javaexcercise {
 public static void main(String[] args)
 {
    int[] myarray = {10,20,30,40,50,60,70,80,90};
    System.out.println("Original Array: "+Arrays.toString(myarray)); 
    int maxval = myarray[0];
    int min = myarray[0];
    for(int i = 1; i < myarray.length; i++)
    {
        if(myarray[i] > maxval)
            maxval = myarray[i];
        else if(myarray[i] < min)
            min = myarray[i];
    }
    System.out.println("Difference between the largest and smallest araay element is: "+(maxval - min));	
 }
}

Result