Java : Program to find a occurrence/count of a particular pattern in a given string

/*
 * Find occurrence/count of a particular pattern in a given string .
 * For example : you have to search for a pattern ca#e or ca$e or ca&e or ca1e 
 *    where 3 character could be any thing but first 2 chars and last
 *    should contain the c ,a and e respectively.
 * 
 *   Input = "carehappyca#eforyouca$ecccaseeeeca@ca$e"
 *   output = 5
 *   
 *   Condition : You don't have to use any inbuilt function like split() or regex() function etc.
 * 
 */

public class CountPatternInStringSequence {

 
 public int countPatternInStringSequence(String str){
  
  char[] ch = str.toCharArray();  // convert the given string to character array;
  int i = 0;
  int count = 0;
  
  while(i < ch.length){
   
   if(ch[i] == 'c'){
    i++;
      if(ch[i] == 'a'){
      i= i+2;
        if(ch[i] == 'e'){
         count++;
        }else{
         i = i-2;     
        }
      }else{
      
       i = i-1;
       }
   }
   
   i = i +1;
 
  }
  return count;
 }
 
 public static void main(String[] args) {

  CountPatternInStringSequence fs = new CountPatternInStringSequence();
  String str = "carehappyca#eforyouca$ecccaseeeeca@ca$e";
  int totalCount = fs.countPatternInStringSequence(str);
  System.out.println("Given String : " + str);
  System.out.println("Total occurence of particular pattern found : " + totalCount);

 }

}

/*
output:

Given String : carehappyca#eforyouca$ecccaseeeeca@ca$e
Total occurence of particular pattern found : 5

 */