How to find on which line a word is in Java

I am trying to create a program that counts the number of times a word appears in a text and also tell you how many times it appears on each line. I have managed to find the number of times the word appears and the number of lines in the text, but I cannot find on which line the word appears in and how many times. Could you please help me? This is my code so far:

    FileReader file = new FileReader("C:/Users/User/Desktop/test.txt");
    BufferedReader buffer = new BufferedReader(file);

    String line = buffer.readLine();
    Map<String, Integer> hash = new HashMap<String, Integer>();
    int counter = 0; //number of lines

    while (line != null){
        String[] words = line.split(" ");

        for (String s : words) {
            Integer i = hash.get(s);
            hash.put(s, (i==null)? 1: i+1);
        }

        line = buffer.readLine();
        counter = counter + 1;           
    }

System.out.println(hash);
System.out.println(counter);