数字在排序数组中出现的次数

public class count{
    public int getCount(int[] array,int num){
        if(array == null || array.length == 0) return -1;
        else if(array[0] == array[array.length-1]){
            if(num == array[0]) return array.length;
            else return 0; 
        }else{
            int count = 0;
            for(int i=0;i<array.length;i++){
                if(num == array[i]) count++;
            }
            return count;
        }
    }
    public static void main(String[] args){
        int[] array = {1,2,3,3,3,3,4,5};
        count c = new count();
        int result = c.getCount(array,5);
        System.out.println(result);
    }
}