/**  * @param args  */ public static void main(String[] args) {    String srcText = "Hello World";   String findText = "e";   int num = appearNumber(srcText, findText);   System.out.println(num); }  /**  * 獲取指定字符串出現的次數  *  * @param srcText 源字符串  * @param findText 要查找的字符串  * @return  */ public static int appearNumber(String srcText, String findText) {   int count = 0;   Pattern p = Pattern.compile(findText);   Matcher m = p.matcher(srcText);   while (m.find()) {     count++;   }   return count; }