zero-plentiful

An array is zero-plentiful if it contains at least one 0 and every sequence of 0s is of length at least 4.
Write a method named isZeroPlentiful which returns the number of zero sequences if its array argument is zero-plentiful, otherwise it returns 0.
If you are programming in Java or C#, the function signature is
int isZeroPlentiful(int[ ] a)
If you are programming in C or C++, the function signature is
int isZeroPlentiful(int a[ ], int len) where len is the number of elements in the array a.

java实现代码：

package com.zzy;

/**
 * 更多请关注: http://huamaodashu.com
 * Created by huamaodashu  on 31/07/2018.
 */
public class ZeroPlentiful {

    public static void main(String[] args) {

//        int[] a = {1, 2, 0, 0, 0,0,0,0,0,0,0, 2, -18, 0, 0, 0, 0, 0, 12};
//        int[] a = {0, 0, 0, 0, 0};
//        int[] a = {1, 2, 0, 0, 0, 0, 2, -18, 0, 0, 0, 0, 0, 12};
//        int[] a = {0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0};
//        int[] a = {1, 2, 3, 4};
//        int[] a = {1, 0, 0, 0, 2, 0, 0, 0, 0};
//        int[] a = {0};
        int[] a = {};
        System.out.println(isZeroPlentiful(a));

    }
    public  static  int isZeroPlentiful(int[] a){

        if(a.length >= 4) {


            int count = 0;
            int zeroCount = 0;

            for (int i = 0; i < a.length; i++) {
                System.out.println("i="+i);
                if (a[i] == 0) {
                    count++;
                } else if (count >= 4) {
                    zeroCount++;
                    count = 0;
                } else if (count > 0) {
                    return 0;
                }
            }

            if(count >= 4){
                zeroCount ++;
            }

            return zeroCount;
        }else {
            System.out.println("esle");
            return 0;
        }

    }
}