如何把一个数组循环右移K位

package java程序员面试笔试宝典;

import java.util.Arrays;

public class 题8_5_6数组循环右移k位 {
	public static void main(String[] args) {
		int[] a={1,2,3,4,5,6,7,8};
		reverse_1(a,2);
	}
	//时间换空间
	public static void reverse_1(int[] a,int k){
		k=k%a.length;
		int s=a.length-k;
		reverse(a, 0, s-1);
		reverse(a, s, a.length-1);
		reverse(a, 0, a.length-1);
		for (int i = 0; i < a.length; i++) {
			System.out.print(a[i]+" ");
		}
	}
	public static void reverse(int[] a,int begin,int end){
		int b;
		int e;
		for (b=begin,e=end; b<e ;b++, e--) {
			int temp=a[b];
			a[b]=a[e];
			a[e]=temp;
		}
	}
	public static void reverse_0(int[] a,int k){
		k=k%8;
		for (int i = a.length-k; i < a.length; i++) {
			System.out.print(a[i]+"  ");
		}
		for (int i = 0; i < a.length-k; i++) {
			System.out.print(a[i]+"  ");
		}
	}
	//这种不好
	public static void reverse(int[] a,int k){
		k=k%8;
		a=Arrays.copyOf(a, a.length*2);
		for (int i = 0; i < a.length/2; i++) {
			a[(a.length/2)+i]=a[i];
		}
		for (int i = a.length/2-k; i < a.length/2-k+8; i++) {
			System.out.print(a[i]+" ");
		}
	}
}