统计字符串中子串出现的次数与位置

String str = "|1||2||124|";        String subStr = "||";        int count = 0;        int index = 0;        while ((index = str.indexOf(subStr, index)) != -1) {     System.out.print("位置："+index+" ");             count++;             index += subStr.length();        }        System.out.println(count);