java的二分法怎么写？？

public class BinaryTest {
public static int binary(int[] array,int value) {
int low = 0;
int high = array.length -1;
while (low <= high){
int mid = (low+high)/2;
if (value == array[mid])
return mid;
if (value > array[mid])
low = mid +1;
if (value < array[mid])
high = mid -1;

    }
    return -1;

}

public static void main(String[] args) {
    int[] a = {1,3,6,8,12,34,67,99};
    int value = binary(a,3);
    System.out.println(value);
}

}

public int binarySearch(int[] a,int num){
int low = 0;
int high = a.length - 1;

while(low <= high){
int middle = (low + high) / 2;
if(num == a[middle])
return middle;
else if(num < a[middle])
high = middle - 1;
else
low = middle + 1;
}

return -1;
}

int main()
{
int A[] = { 5, 2, 9, 4, 7, 6, 1, 3, 8 };// 从小到大二分插入排序
int n = sizeof(A) / sizeof(int);
int i, j, get, left, right, middle;

for (i = 1; i < n; i++)                 
{
    get = A[i];                         
    left = 0;                           
    right = i - 1;                      
    while (left <= right)              
    {
        middle = (left + right) / 2;
        if (A[middle] > get)
            right = middle - 1;
        else
            left = middle + 1;
    }
    for (j = i - 1; j >= left; j--)    
    {
        A[j + 1] = A[j];            
    }
    A[left] = get;                    
}
printf("二分插入排序结果：");
for (i = 0; i < n; i++)
{
    printf("%d ", A[i]);
}
printf("\n");
return 0;

}