Min_ABS_DIFF_ARRAY.java

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'minimumAbsoluteDifference' function below.
     *
     * The function is expected to return an INTEGER.
     * The function accepts INTEGER_ARRAY arr as parameter.
     */

    public static int minimumAbsoluteDifference(List<Integer> arr) 
    {
        // Write your code here
        int i,j;
        //sorting the list..
        Collections.sort(arr);
        //traversing the arr list..
        int min = Integer.MAX_VALUE;
        
       //best way is to first sort the list and compare it with the next element..
        for(i=0;i<arr.size()-1;i++)
        {
            int result = Math.abs(arr.get(i)-arr.get(i+1));  //calculating the difference..
            min = Math.min(min,result); 
        }
        return min;
    }
}
public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int n = Integer.parseInt(bufferedReader.readLine().trim());

        List<Integer> arr = Stream.of(bufferedReader.readLine().replaceAll("\\s+$", "").split(" "))
            .map(Integer::parseInt)
            .collect(toList());

        int result = Result.minimumAbsoluteDifference(arr);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedReader.close();
        bufferedWriter.close();
    }
}