Please fill in where it asks in java // Your class. Notice how it has no generic

Please fill in where it asks in java
// Your class. Notice how it has no generics.
// This is because we use generics when we have no idea what kind of data we are getting
// Here we know we are getting two pieces of data: a string and a line number
public class IndexTree {
// This is your root 
// again, your root does not use generics because you know your nodes
// hold strings, an int, and a list of integers
private indexNode root;
// Make your constructor
// It doesn’t need to do anything
// complete the methods below
// this is your wrapper method
// it takes in two pieces of data rather than one
// call your recursive add method
public void add(String word, int lineNumber) {
}
// your recursive method for add
// Think about how this is slightly different the the regular add method
// When you add the word to the index, if it already exists, 
// you want to add it to the IndexNode that already exists
// otherwise make a new indexNode
private indexNode add(indexNode root, String word, int lineNumber) {
return null;
}
// returns true if the word is in the index
public boolean contains(String word) {
return false;
}
// call your recursive method
// use book as guide
public void delete(String word) {
}
// your recursive case
// remove the word and all the entries for the word
// This should be no different than the regular technique.
private indexNode delete(indexNode root, String word) {
return null;
}
// prints all the words in the index in inorder order
// To successfully print it out
// this should print out each word followed by the number of occurrences and the list of all occurrences
// each word and its data gets its own line
public void printIndex() {
}
public static void main(String[] args) {
IndexTree index = new IndexTree();
// add all the words to the tree
// print out the index
// test removing a word from the index
}
}
public class ReadingFromFileExample {
public static void main(String[] args) {
String fileName = “pg100.txt”;
try {
Scanner scanner = new Scanner(new File(fileName));
while (scanner.hasNextLine()) {
String line = scanner.nextLine();
System.out.println(line);
//String[] words = line.split(“s+”);
//for(String word : words){
//