Remove Duplicates from Sorted Array

/*

  Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.
  Do not allocate extra space for another array, you must do this in place with constant memory.
  For example,Given input array A = [1,1,2],Your function should return length = 2, and A is now [1,2].

*/
public class Solution{
  private int count = 1;
  public int removeDuplicates(int A[]){
    if(A.length == 0)
        return 0;
    for(int i = 1;i<A.length;i++){
      if(A[i]==A[i-1]){
        continue;
      }
      else{
        A[count] = A[i];
        count++;
      }
    }
    return count;
  }
}
class Test{
    public static void main(String[] args){
        int A[] = {1,1,2,3,3,4,5,6,6,7};
        int count = 0;
        Solution answer = new Solution();
        count = answer.removeDuplicates(A);
        System.out.println("去掉重复元素后数组的长度为："+count);
    }
}