Question

所以我有一堆用于动物医院的课程。我的超级类Pet，有四个常量，MALE，FEMALE，SPAYED，NEUTERED，它们被设置为数字。当读入数据文件时，在我的AnimalHospitalClass中，应该将性别设置为数字，返回Pet类将“sexId”与常量进行比较，然后返回性别。我所遇到的问题不符合逻辑但是技术性。出于某种原因，我的setter是（setSex（sexID））得到我的性别设置的数字，但当我尝试在我的getter中使用if语句来比较数字并返回性别时，sexID（这是一个Pet类中的变量）被设置回0，而不是我设置它。

继承我的宠物类：

     public class Pet{
 private String petName;
 private String ownerName;
 private String color;
 protected int sexID;

 public static final int MALE = 1;
 public static final int FEMALE = 2;
 public static final int SPAYED = 3;
 public static final int NEUTERED = 4;


 public Pet(String petName, String ownerName, String color){
      this.petName = petName;
      this.ownerName = ownerName;
      this.color = color;
  }

 // getters
 public String getPetName(){
      return petName;
 }
 public String getOwnerName(){
      return ownerName;
  }
  public String getColor(){
      return color;
  }

  public String getSex(){
  /* this is where I am having issues, instead of sexID being set to what
   it is in the setter, it is set back to 0*/
  System.out.println("SEXID: " + sexID); // will print 0
      if(sexID == MALE){
           return("male " );
      }
      else if(sexID == FEMALE){
           return("female");
      }
     else  if(sexID == SPAYED){
           return("spayed");
      }
     else if(sexID == NEUTERED){
           return("neutered");
      }

     else{ // will print else only since sexID is equal to 0 
      return("Not Available. " + sexID); 
// in case there is no gender in the file
     }
  }

  public void setSex(int sexID){
      this.sexID = sexID;
      System.out.println("SEX: " + sexID); // this will print the correct
                                      // sexID that was set in the other class        


    }

  public String toString(){
      return(petName + "owned by " + ownerName
             + "\nColor: " + color
             +"\nSex: " + getSex() );
   }
  }

这是我的动物医院类（因为它很大，只有一种方法）：

    import java.util.*;
    import java.io.*;
     public class AnimalHospital{
         Scanner input;

        private String pName;
private String pName2;
private String oName;
private String color ;
private String specialType; // store hair length for cats, size for dogs
private String gender;
private String type; // finds CAT, DOG, BIRD




public AnimalHospital(String inputFile)throws FileNotFoundException{

    input = new Scanner(new File(inputFile));

}
     public void printPetInfoByOwner(String name){

     Pet pet = new Pet(pName,oName,color);

     while(input.hasNext()){
        String type = input.next(); // finds Cat, Dog, Bird
        pName = input.next(); // gets pet name
        oName = input.next(); // gets owner name
        color = input.next();
        gender = input.next();

         if(gender.equals("male")){   // this is where I set the gender
           int male = 1;           // to a number so I can compare

           pet.setSex(male);
        }
         if(gender.equals("female")){
           int female = 2;

           pet.setSex(female);

        }
         if(gender.equals("spayed")){
           int spayed = 3;

          pet.setSex(spayed);
        }
         if(gender.equals("neutered")){
           int neutered = 4;

          pet.setSex(neutered);
        }

         if(!(type.equals("BIRD"))){
        specialType = input.next(); // since Bird does not have a special type
        }
        if(type.equals("CAT") && oName.equals(name)){
            Cat cat = new Cat(pName, oName, color, specialType);

             System.out.println(cat.toString());
            break;

        }
        if(type.equals("DOG") && oName.equals(name)){
            Dog d = new Dog(pName, oName, color, specialType);

            System.out.println(d.toString());
            break;

        }
        if(type.equals("BIRD") && oName.equals(name)){
            Bird b = new Bird(pName, oName, color);

            System.out.println(b.toString());
            break;

        }



    }

}

这是一个示例输出：

   CAT: Busker owned by Samantha
   Color: Black
   Sex: Not Available. 0 // reads sex as 0 should be 2, and female
   Hair: short
   AnimalHospital@55f96302 // also how do I get rid of this?

注意：

这是一项任务，我理解如果你不想给我答案，任何提示都会有所帮助，但我已经考虑了好几天而无法弄明白。

谢谢！

Answer 1

您在pet变量上设置了Pet的类型。然后你创造一只猫，鸟或狗，从不设置它的性别，并打印它。所以，既然你从未设定过Cat，Bird或Dog的性别，那就是0。

我的getter被初始化为零？

1 个答案: