import java.util.Arrays;

public class MainClass {
    public static void main(String[] args) {
        int[] array = {1,2,3,4,5,4,3,2,1};
        System.out.println(Arrays.toString(array));
        System.out.println(_check(array));
    }

    private static boolean _check(int[] array) {
        boolean isPalindrome = true;
        int length = array.length;

        int firstIndex = 0;
        int lastIndex = array.length - 1;

        int formFirst = firstIndex;
        int fromLast = lastIndex;

        while (formFirst <= length / 2
                && fromLast >= length / 2) {

            System.out.print(array[formFirst] + " " + array[fromLast] + " // ");
            if(array[formFirst] != array[fromLast])
                isPalindrome = false;

            formFirst++;
            fromLast--;
        }
        return isPalindrome;
    }
}