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  1. import java.util.*;
  2.  
  3. public class Library{
  4.  
  5.   public Library(){
  6.     }
  7.  
  8.  public void getFinishedBooks(HashMap<String, Boolean> library){
  9.  if (library.size() < 1){
  10.    System.out.println("Error the HashMap is empty");
  11.  }
  12.  
  13.    else {
  14.      for (String book : library.keySet()){
  15.        if (library.get(book) == true){
  16.          System.out.println (book);
  17.             }
  18.      }
  19.    }
  20.  }
  21.  
  22.  public static void main(String[] args)
  23.  {
  24.    
  25.  HashMap<String, Boolean> myBooks = new HashMap<String, Boolean>();
  26.      
  27.      myBooks.put("Road Down the Funnel", true);
  28.      myBooks.put("Rat: A Biology", false);
  29.      myBooks.put("TimeIn", true);
  30.      myBooks.put("3D Food Printing", false);
  31.      
  32.   Library myLibrary = new Library();
  33.      
  34.      myLibrary.getFinishedBooks(myBooks);
  35.    
  36.  
  37.    }  
  38. }
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