public static void main(String[] args) throws IOException {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String text = "abcdbc";
    String findStr = "bc";

    int count = 0;
    int currentIndex = 0;
    currentIndex = text.indexOf(findStr, currentIndex);
    System.out.println(text.substring(currentIndex, currentIndex + findStr.length()));
    // 찾은 값 반환

    currentIndex = 0;
    while (currentIndex != -1) {
      currentIndex = text.indexOf(findStr, currentIndex);
      if (currentIndex != -1) {
        count++;
        currentIndex += findStr.length();
      }
    }

    System.out.println(count);
    // 찾은 갯수 반환

  }