code: @SuppressWarnings({"MethodWithMultipleReturnPoints", "LabeledStatement", "ValueOfIncrementOrDecrementUsed", "ContinueStatement", "ContinueStatementWithLabel"})
      public static int indexOf(char[] src, char[] find, int startAt) {
          int startPos = startAt;
          final int max = src.length - find.length;
          if (startPos > max) {
              return -1;
          }
          final char find0 = find[0];
          final int len = find.length;
          int j;
          int k;
  
          // Find the first character
          startOver:
          while (startPos <= max) {
              if (src[startPos++] == find0) {
                  // First character found - look for the rest
                  j = startPos;
                  k = 1;
                  while (k < len) {
                      if (src[j++] != find[k++]) {
                          continue startOver;
                      }
                  }
                  return startPos - 1;
              }
          }
          return -1;
      }
docs: Same as String.indexOf but (slightly) faster ;)
  
  Hint: Performance optimized code - so some warnings are suppressed.