int[] 排序

import java.util.Arrays;

public class Test {

	public static void main(String[] args) {
		int[] a = { 1, 3, 5, 8, 77, 6, 0, 100, 84, 32, 9, 88, 99, 4, 7, 90 };
		Arrays.sort(a);//数组排序方法
		int length = a.length;
		int n = a.length;
		StringBuffer sb = new StringBuffer();
		for (int i = 0; i < length; i++) {
			if (length - 1 != i) {
				sb.append(a[length - 1] + ",");
				sb.append(a[i] + ",");
				length--;
			} else {
				if (n % 2 == 0) {
					sb.append(a[length - 1] + ",");
					sb.append(a[i]);
					length--;
				} else {
					sb.append(a[i]);
				}
			}
		}
		System.out.println(sb);
	}
}