java - 使用用户输入值显示数组列表中的特定对象

Question

我正在尝试创建一个程序，用户输入与动物相关的值，然后创建动物对象，然后将其保存到数组列表中。我遇到问题的区域如下所示。填充数组列表后，我无法弄清楚如何使用用户输入(选择)来查找数组列表中的值索引。 (int索引=animalList.indexOf(？))

非常感谢任何帮助

Scanner in = new Scanner(System.in);
  List <Animal> animalList = new ArrayList <Animal>();
    char ans;

do{  // User input
  Animal animal = new Animal(); // arraylist

   System.out.println("Animal's 'common' name: ");
     animal.setName(in.next());

   System.out.println("Animal's class: ");
     animal.setAnmlClass(in.next());

   System.out.println("Vertabrate or Invertabrate: ");
     animal.setCharVert(in.next());

   System.out.println("Warm or Cold blooded: ");
     animal.setCharBld(in.next());

   System.out.println("Animal's habitat (general): ");
     animal.setCharHab(in.next());

   System.out.println("Would you like to enter in a new animal (y/n)? ");
     String answer = in.next();
        ans = answer.charAt(0);

    animalList.add(animal);

  }while(ans == 'y');

   System.out.println("Enter the animal you wish to view: ");
     String select = in.next();
     System.out.println(select);
     int index =  animalList.indexOf( ? );
     System.out.println(index);

Answer 1

您可以考虑制作一个哈希表而不是列表，并以动物名称作为键。