OOP) Personal Library

import java.util.HashMap;

public class Library {

    //Library constructor
    public Library () {
    }

    //Method to get a list of finished books. Parameter of a Hashmap.
    public void getFinishedBooks (HashMap<String,Boolean> library){
        System.out.println();
        if (library.size()<1){
            System.out.println("Your book-list is empty.");
        } else {
            System.out.println("Your completed list of finished books:");
            //for each key (book) in the library keyset..."
            for(String book:library.keySet()){
                if ( library.get(book) == true){
                    System.out.println(book);
                }

            }
        }
    }

    //Method to get a list of unfinished books.
    public void getUnfinishedBooks (HashMap<String,Boolean> library) {
        System.out.println();
        if (library.size() < 1) {
            System.out.println("Your book-list is empty.");
        } else {
            System.out.println("Your list of unfinished books:");
            for (String book : library.keySet()) {
                if (library.get(book) == false) {
                    System.out.println(book);
                }
            }
        }
    }

    public static void main(String[] args) {
        //Create a new HAshmap called myBooks, the key is a String and the value is a Boolean.
        HashMap<String,Boolean> myBooks = new HashMap<>();

        //Add new keys and values to the Hashmap
        myBooks.put("Road Down The Funnel", true);
        myBooks.put("Rat: A Biology", false);
        myBooks.put("TimeIn", true);
        myBooks.put("3D Food Printing", false);

        //Create/instantiate a new Library object
        Library myLibrary = new Library();

        //Call the getFinishedBooks method, with the HashMap as the parameter.
        myLibrary.getFinishedBooks(myBooks);
        myLibrary.getUnfinishedBooks(myBooks);

    }
}