Solution for the assignment "find occurrence of a word in string"

This code is implemented and provided by "ITI" From "Banasthali University"

import java.util.*;

public class StringIndex
{

    public static void main(String[] args)
{

    System.out.println("PLEASE ENTER A PARAGRAPGH : ");
Scanner sc=new Scanner(System.in);

        System.out.println("PLEASE ENTER A WORD : ");
String p=sc.nextLine();
        String w=sc.nextLine();

     System.out.println("FIRST INDEX OF "+w+" = "+fi);
//finding first index of w in p
        int fi=p.indexOf(w);

        System.out.println("LAST INDEX OF "+w+" = "+li);
//finding last index of w in p
        int li=p.lastIndexOf(w);
        int c=0;

       //loop for upgrading the index in  order to check 
System.out.print("ALL THE INDEXES OF "+w+" = ");

       //finding all the indexes of w in p

       //it's further occurrence
while(fi>=0)
        {

  //finding index of next occurrence until it returns -1  
fi=p.indexOf(w,fi+1);
     System.out.print(fi+",");
     //calculating frequency

}
c++;
        }
    System.out.println("\n"+w+" OCCURRED "+c+" TIMES ");

    }