public class Test {        public static int count(String text,String sub){            int count =0, start =0;            while((start=text.indexOf(sub,start))>=0){                start += sub.length();                count ++;            }            return count;        }        public static void main(String[] args){            String text ="nihaoksdoksad";            String sub ="o k";            System.out.println(count(text,sub));        }    }