check no of occurence

Program-

Write a java program to find out the number of times a substring occurs within the string

class Search

{

            public static void main(String args[ ])

            {

            String s=new String("this is a this is a this is a that");

            String p=new String(args[0]);

            int count=0;

            int position=0;

            while(position=s.indexOf(p,position)!=-1)

            {                      count++;

                        position=position+p.length();

            }

            System.out.println("Total Occurances ="+count);

}

}