java

Java Merge Array

import java.util.*;

class MergeArray {
        public static int[] merge(int[]... arr) {
                int arrSize = 0;
                for (int[] array : arr) {
                        arrSize += array.length;
                }
                int[] result = new int[arrSize];
                int j = 0;
                for (int[] array : arr) {
                        for (int s : array) {
                                result[j++] = s;
                        }
                }
                return result;
        }

        public static void main(String[] args) {
                int[] array1 = new int[5];
                System.out.println("Enter 5 numbers");
                Scanner input = new Scanner(System.in);
                for (int i = 0; i < array1.length; i++) {
                        array1[i] = input.nextInt();
                }
                Arrays.sort(array1);
                int[] array2 = new int[3];
                System.out.println("Enter 3 numbers");
                for (int i = 0; i < array2.length; i++) {
                        array2[i] = input.nextInt();
                }
                Arrays.sort(array2);
                int[] array3 = new int[2];
                System.out.println("Enter 2 numbers");
                for (int i = 0; i < array3.length; i++) {
                        array3[i] = input.nextInt();
                }
                Arrays.sort(array3);
                int M[] = (int[]) merge(array1, array2, array3);
                System.out.println("Merged Array is: ");
                Arrays.sort(M);
                for (int i = 0; i < M.length; i++) {
                        System.out.println(M[i]);
                }
                String arr[]=new String[M.length];
                for(int i=0;i<M.length;i++){
                    arr[i]=Integer.toString(M[i]);
                }
                List<String> list = Arrays.asList(arr);
        Set<String> set = new HashSet<String>(list);

        System.out.print("After removing duplicates duplicates: ");
        String[] result = new String[set.size()];
        set.toArray(result);
        Arrays.sort(result);
        for (String s : result) {
            System.out.println(s);
       }
    }
}