vault backup: 2024-01-21 00:27:23

2024-01-21 00:27:23 +00:00
parent 358e43950b
commit 7a6e5c1b31
46 changed files with 1226 additions and 14 deletions
--- a/1/zoo-io-v1/Zoo.java
+++ b/1/zoo-io-v1/Zoo.java
@@ -0,0 +1,192 @@
+import java.util.*;
+import java.io.*;
+/**
+ * class <code>Zoo</code> simulates storing animals in a collection.
+ *
+ * @author D Newton
+ * */
+public class Zoo
+{
+   private ArrayList<Animal> animalCollection;
+   private int lionCount;
+   private int tigerCount;
+   private int elephantCount;
+   private int otherCount;
+
+   /**
+    * Create an "empty" zoo
+    */
+   public Zoo()
+   {
+      animalCollection = new ArrayList<Animal>();
+      lionCount = 0;
+      tigerCount = 0;
+      elephantCount = 0;
+      otherCount = 0;
+   }
+
+   /**
+    * Create a zoo and populate it using data from a text file
+    */
+   public Zoo(String fileName) throws FileNotFoundException
+   {
+      this();
+      readAnimalData(fileName);
+   }
+   
+   /**
+    * Adds an animal to the zoo
+    *
+    * @param   <code>animal</code> an <code>Animal</code> object, the animal to be added
+    */
+   public void storeAnimal(Animal animal)
+   {
+      animalCollection.add(animal);
+   }
+
+   /**
+    * Shows an animal by printing it's details.  This includes
+    * it's position in the collection.
+    *
+    * @param  <code>listPosition</code> the position of the animal
+    */
+   public void showAnimal(int listPosition)
+   {
+      Animal animal;
+      if( listPosition < animalCollection.size() )
+      {
+         animal = animalCollection.get(listPosition);
+         System.out.println("Position " + listPosition  + ": " + animal);
+      }
+   }
+
+   /**
+    * Returns how many animals are stored in the collection
+    *
+    * @return   the number of animals in the collection
+    */
+   public int numberOfAnimals()
+   {
+      return animalCollection.size();
+   }
+
+   /**
+    * Displays all the animals in the collection
+    *
+    */
+   public void showAllAnimals()
+   {
+      System.out.println("Zoo");
+      System.out.println("===");
+
+      int listPosition = 0;
+      while( listPosition<animalCollection.size() )
+      {
+         showAnimal(listPosition);
+         listPosition++;
+      }
+      System.out.println(listPosition + " animals shown" );    // display number of animals shown  
+   }
+
+    /**
+    * Remove an animal from the collection
+    *
+    * @param  <code>listPosition</code> the position of the animal
+    */
+   public void removeAnimal(int listPosition)
+   {
+       if( listPosition>=0 && listPosition<animalCollection.size() )
+       {
+          animalCollection.remove(listPosition);
+       }
+       else
+       {
+          System.out.println("Invalid position");
+       }
+   }
+
+  /**
+    * Adds a pre-defined set of animals to the current collection
+    *
+    */
+   public void populate()
+   {
+      storeAnimal( new Animal("lion", "Leo") );
+      storeAnimal( new Animal("tiger", "Tommy") );
+      storeAnimal( new Animal("elephant", "Ollie") );
+      storeAnimal( new Animal("rat", "Roland") );
+      storeAnimal( new Animal("reindeer", "Rudolph") );
+      storeAnimal( new Animal("Lion", "Lenny") );
+      storeAnimal( new Animal("Elephant", "Nellie") );
+      storeAnimal( new Animal("tiger", "Tessa") );
+      storeAnimal( new Animal("eLephant", "Hetty") );
+      storeAnimal( new Animal("LION", "Leslie") );      
+   }
+
+   /**
+    * Counts the number of lions, tigers and elephants
+    *
+    */
+   public void countAnimals( )
+   {
+       lionCount = 0; tigerCount = 0; 
+       elephantCount= 0; otherCount = 0;
+       Iterator<Animal> it = animalCollection.iterator();
+       while( it.hasNext() )
+       {
+           Animal currentAnimal = it.next();
+           String species = currentAnimal.getSpecies();
+           if( species.equalsIgnoreCase("lion") )
+              lionCount++;
+           else if( species.equalsIgnoreCase("tiger") )
+              tigerCount++;
+           else if( species.equalsIgnoreCase("elephant") )
+              elephantCount++;
+           else
+              otherCount++;
+       }
+   }
+
+   /**
+    * Writes animal data to a file
+    *
+    * @param   <code>fileName</code> a <code>String</code>, the name of the 
+    *          text file in which the data will be stored.
+    * 
+    * @throws  FileNotFoundException
+    */
+   public void writeAnimalData(String fileName) throws FileNotFoundException
+   {
+      PrintWriter pWriter = new PrintWriter(fileName);
+      
+      for(Animal a: animalCollection)
+      {
+         String lineOfOutput = a.getName() + " " + a.getSpecies();
+         pWriter.println(lineOfOutput);
+      }
+      pWriter.close();
+   }
+
+   /**
+    * Reads animal data from a file and adds corresponding animals to the zoo
+    *
+    * @param   <code>fileName</code> a <code>String</code>, the name of the 
+    *          text file in which the data is stored.
+    * 
+    * @throws  FileNotFoundException
+    */   
+   public void readAnimalData(String fileName) throws FileNotFoundException
+   {
+	   File dataFile = new File(fileName);
+      Scanner scanner = new Scanner(dataFile);
+
+      while( scanner.hasNext() )
+      {
+         String name = scanner.next();
+         String species = scanner.next();
+         storeAnimal( new Animal(species, name) );
+      }
+      
+      scanner.close();
+   }
+}