# Java Program to Find Out the Minimum Difference between Two Elements Inside an Array

In the previous article, we have discussed about Java Program to Find All the Elements in an Array that are Smaller than All Elements to Their Left

In this article we are going to see how we can find out the minimum difference between two elements inside an array by using Java programming language.

## Java Program to Find Out the Minimum Difference between Two Elements Inside an Array

Here we will find minimum difference between two elements in an array.

For example:

There is an array arr={ 1, 3, 5, 4, 8, 2, 4, 3, 6, 5 }

Example-1

Two elements are
x=5 and y=8
We can see 5 is present at index 2 and 9
While 8 is present at index 4
So the minimum difference between element 5 and 8 is 2 (i.e.4-2=2)

Example-2

Two elements are
x=4 and y=8
We can see 4 is present at index 3 and 6
While 8 is present at index 4
So the minimum difference between element 4 and 8 is 1 (i.e.4-3=1)

Approach:

• Create an array of elements and two variables with the elements we want to check.
• Create a user defined function that takes the array and the two elements as arguments. Traverse through the array and if we encounter the variables x and y then set the x_/y iterator to that index and calculate the minimum difference using the Integer.min( ) function.
• Print the minimum difference.

Program:

import java.util.*;
public class Main
{
public static void main(String[] args)
{
int[] arr = { 1, 3, 5, 4, 8, 2, 4, 3, 6, 5 };
int x = 8, y = 3;
// Calls the minDifference function
int minimumDiff = minDifference(arr,x,y);
// Print the minimum difference
// If the minimum difference is equal to MAX_VALUE then it is invalid
if(minimumDiff!=Integer.MAX_VALUE)
System.out.println("The minimum difference is " + minimumDiff);
else
System.out.println("Invalid!");
}
// User defined function to calculate the minimum difference between two elements
public static int minDifference(int[] arr, int x, int y)
{
int x_iter = arr.length, y_iter = arr.length, min_diff = Integer.MAX_VALUE;
// traverse throgh the array
for (int i = 0; i < arr.length; i++)
{
// if the current element is x
if (arr[i] == x)
{
// set x_iter to the current index
x_iter = i;
if (y_iter != arr.length)
{
min_diff = Integer.min(min_diff, Math.abs(x_iter - y_iter));
}
}
// if the current element is y
if (arr[i] == y)
{
// set y_iter to the current index
y_iter = i;
if (x_iter != arr.length)
{
min_diff = Integer.min(min_diff, Math.abs(x_iter - y_iter));
}
}
}
return min_diff;
}
}


Output:

The minimum difference is 3

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