Question

我专注于方法readDataFromFile()，它可以读取文本分隔的数据，例如：

Bird    Golden Eagle    Eddie
Mammal  Tiger   Tommy
Mammal  Lion    Leo
Bird    Parrot  Polly
Reptile Cobra   Colin

目前，我已使用扫描仪方法分隔了每个单词，例如：Reptile, Cobra. Colin。

我唯一需要做的就是使用这些子字符串创建一个Animal对象并将其添加到Zoo中。

Animal包括：name和species。

任何指导我如何实现此目标的帮助或建议都将非常令人惊奇。

MyZoo类：

public class MyZoo
{
   private String zooId;
   private int nextAnimalIdNumber;
   private TreeMap<String, Animal> animals;
   private Animal animal;

   public MyZoo(String zooId)
   {
      this.zooId = zooId.trim().substring(0,3).toUpperCase();
      nextAnimalIdNumber = 0;
      animals = new TreeMap<String, Animal>();
   }

   public String allocateId()
   {
      nextAnimalIdNumber++;
      String s = Integer.toString(nextAnimalIdNumber);
      while ( s.length()<6 )
         s = "0" + s;
      return zooId + "_" +  s;
   }

   public void addAnimal(Animal animal)
   {
      animals.put(animal.getName(), animal);
      this.animal = animal;
   }

   public void readDataFromFile() throws FileNotFoundException
   {
      int noOfAnimalsRead = 0;

      String fileName = null;

      JFrame mainWindow = new JFrame();
      FileDialog fileDialogBox = new FileDialog(mainWindow, "Open", FileDialog.LOAD);
      fileDialogBox.setDirectory("."); 
      fileDialogBox.setVisible(true);

      fileName = fileDialogBox.getFile();
      String directoryPath = fileDialogBox.getDirectory();

      File dataFile = new File (fileName);
      Scanner scanner = new Scanner(dataFile);
      //System.out.println("The selected file is " + fileName);

      scanner.next();
      while(scanner.hasNextLine())
       {
       String type = scanner.next();
       String species = scanner.next();
       String name = scanner.next();
       System.out.println(species + ": " + name);
       scanner.nextLine();
       }
       scanner.close();
    }

}

动物类：

public class Animal
{
   private String id;
   private String species;
   private String name;
   public Animal(String species, String name, MyZoo owner)
   {
      id = owner.allocateId();
      this.species = species;
      this.name  = name;
   }

   public String getId()
   {
      return id;
   }

   public String getName()
   {
      return name;
   }

   public String getSpecies()
   {
      return species;
   }

   public String toString()
   {
      return id + "  " + name + ": a " + species;
   }
}

Answer 1

找到名称和物种后，就可以使用Animal的构造函数创建实例，然后将其添加到您的动物园中：

while(scanner.hasNextLine()){
    String type = scanner.next();
    String species = scanner.next();
    String name = scanner.next();
    System.out.println(species + ": " + name);
    scanner.nextLine();

    Animal a = new Animal(species, name, this); // 'this' bevcause its requires a MyZoo 
    this.addAnimal(a);
    // can inline : addAnimal(new Animal(species, name, this));
}

用子字符串创建Animal对象

1 个答案: