gistfile1.txt

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class JavaDemo {

    public static void main(String[] args) {
        int[]array = {1,2,3,4,5,6,7};
        int[] newArray = reorderFromIndex(array, 4);

        for(int i = 0; i < newArray.length; i++ ) {
            System.out.println(newArray[i]);
        }
    }

    static int[] reorderFromIndex(int[] array, int index) {
        List info = Arrays.stream(array).boxed().collect(Collectors.toList());

        List<Integer> newList = info.subList(index, array.length);
        newList.addAll(info.subList(0, index-1));

        return newList.stream().mapToInt(Integer::intValue).toArray();
    }
}