Count the number of occurrences of a character in a String?

1. package com.instaceofjava; 
2.  
3. public class StringCount {
4.  
5. public static void main(String[] args)
6. {
7.  
8. String str = "abcdcabcdacbdadbca";
9.  
10.     String findStr = "b";
11.     int lastIndex = 0;
12.     int count = 0;
13.  
14.     while (lastIndex != -1) {
15.  
16.     lastIndex = str.indexOf(findStr, lastIndex);
17.  
18.     if (lastIndex != -1) {
19.     count++;
20.     lastIndex += findStr.length();
21.  
22.     }
23.     }
24.     System.out.println(count);
25. }
26.  
27. }

Output:

1. 4