Count Number Of Times Word Occurs

import java.io.*;

public class position
{ public static void main(String args[]) throws IOException
{ InputStreamReader read = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(read);

System.out.println("Enter a sentence");
String a=br.readLine();
System.out.println("Enter word to be searched for");
String word = br.readLine();

int count=0;
int pos=-1;
pos = a.indexOf(word);

while(pos>=0)
{ count++;
pos = pos + word.length();
pos = a.indexOf(word,pos);
}
System.out.println("Number of times word occurs " +count);
System.out.println(pos);
}
}