有一个整数数组，长度为9，数组里的值是多少不清楚，但是知道数组中有8个值是相等，其中一个小于其他8个值，目前有一个标准函数，compare(int[] a, int[] b),返回0相等1大于

public class ArrayTest2 {

    public static void main(String[] args) {
        int[] num = new int[]{2,2,2,2,2,2,1,2,2};
        int[] a = new int[]{num[0],num[1],num[2]};
        int[] b = new int[]{num[3],num[4],num[5]};
        int[] c = new int[]{num[6],num[7],num[8]};
        int result = compare(a,b);
        //说明b里有那个数
        if(result == 1){
            int[] d = new int[]{num[3]+num[4]};
            int[] e = new int[]{num[4]+num[5]};
            int result1 = compare(d,e);
            if(result1 == 0){
                System.out.println(num[4]);
            }else if(result1 == 1){
                System.out.println(num[5]);
            }else {
                System.out.println(num[3]);
            }
        }else if(result == 0){
            //说明c里有那个数
            int[] f = new int[]{num[6]+num[7]};
            int[] g = new int[]{num[7]+num[8]};
            int result2 = compare(f,g);
            if(result2 == 0){
                System.out.println(num[7]);
            }else if(result2 == 1){
                System.out.println(num[8]);
            }else {
                System.out.println(num[6]);
            }
        }else {
            //说明a里有那个数
            int[] h = new int[]{num[0]+num[1]};
            int[] i = new int[]{num[1]+num[2]};
            int result3 = compare(h,i);
            if(result3 == 0){
                System.out.println(num[1]);
            }else if(result3 == 1){
                System.out.println(num[2]);
            }else {
                System.out.println(num[0]);
            }
        }

    }

    public static int compare(int[] a, int[] b){
        if(a.length >= 2 && b.length >= 2){
            int sumA = 0;
            int sumB = 0;
            for (int x = 0 ; x< a.length ;x++){
                sumA += a[x];
            }
            for (int y = 0 ; y < b.length ;y++){
                sumB += b[y];
            }
            if(sumA>sumB){
                return 1;
            }else if(sumA==sumB){
                return 0;
            }else {
                return -1;
            }
        }else {
            if(a[0]>b[0]){
                return 1;
            }else if(a[0]>b[0]){
                return 0;
            }else {
                return -1;
            }
        }
    }
}