import java.util.Arrays;


public class HelloWorld {

	public static void main(String[] args) {
		int [] array = {0, 1, 2, 3, 4, 5, 6};
		System.out.println(Arrays.toString(array));
		invert(array);
		System.out.println(Arrays.toString(array));

	}

	public static void invert(int[] array) {
		for (int k = array.length / 2; k >= 0; k--) {
			int tmp = array[k];
			array[k] = array[array.length - 1 - k];
			array[array.length - 1 - k] = tmp;
		}
	}

}