How to implement strategy design pattern

Can anyone tell how can we implement Strategy design pattern in the following code. I have gone through various links but not fully clear about implementing it. Question is: Calculate points and display the report in PDF or HTML using Strategy Design Pattern. Below is the code already available. Customer, Movie and Rental are classes already created:

1. Customer.java

    public class Customer {
    private String _name;
    private Vector _rentals = new Vector();
    public Customer(String name) {
    _name = name;
    };
   
    public void addRental(Rental arg) {
    _rentals.addElement(arg);
    }
   
    public String getName() {
    return _name;
    }
   
   public static void main(String[] args) {
   
    Customer c = new Customer("ABC");
    Movie m = new Movie("Title", 1);
    Rental r = new Rental(m, 10);
    c.addRental(r);
    // Rental calculation
    String s = c.statement();
    System.out.println("s: " + s);
   }
        public String statement() {
        double totalAmount = 0;
    int frequentRenterPoints = 0;
    Enumeration rentals = _rentals.elements();
    String result = "Rental Record for " + getName() + "\n";
   
    while (rentals.hasMoreElements()) {
        double thisAmount = 0;
        Rental each = (Rental) rentals.nextElement();
   
        // determine amounts for each line
        switch (each.getMovie().getPriceCode()) {
   
        case Movie.REGULAR:
            thisAmount += 2;
            if (each.getDaysRented() > 2)
                thisAmount += (each.getDaysRented() - 2) * 1.5;
            break;
   
        case Movie.NEW_RELEASE:
            thisAmount += each.getDaysRented() * 3;
            break;
   
        case Movie.CHILDRENS:
            thisAmount += 1.5;
            if (each.getDaysRented() > 3)
                thisAmount += (each.getDaysRented() - 3) * 1.5;
            break;
        } // add frequent
            // renter points
        frequentRenterPoints++;
   
        // add bonus for a two day new release rental
        if ((each.getMovie().getPriceCode() == Movie.NEW_RELEASE) && each.getDaysRented() > 1)
            frequentRenterPoints++;
   
        // show figures for this rental
        result += "\t" + each.getMovie().getTitle() + "\t" + String.valueOf(thisAmount) + "\n";
        totalAmount += thisAmount;
    }
   
    // add footer lines
    result += "Amount owed is " + String.valueOf(totalAmount) + "\n";
    result += "You earned " + String.valueOf(frequentRenterPoints) + " frequent renter points";
    return result;
    }
    }
   

2. Movie.java

   public class Movie {
   public static final int CHILDRENS = 2;
   public static final int REGULAR = 0;
   public static final int NEW_RELEASE = 1;
   private String _title;
   private int _priceCode;
   
    public Movie(String title, int priceCode) {
   _title = title;
   _priceCode = priceCode;
   }
   public int getPriceCode() {
       return _priceCode;
   }
   
   public void setPriceCode(int arg) {
   _priceCode = arg;
   }
   public String getTitle() {
   return _title;
   };
   }
   

3. Rental.java

   public class Rental {
       private Movie _movie;
   private int _daysRented;
   public Rental(Movie movie, int daysRented) {
       _movie = movie;
   _daysRented = daysRented;
   }
   public int getDaysRented() {
       return _daysRented;
   }
       public Movie getMovie() {
       return _movie;
   }
   }