Question

我是一名Java编程学生，忙着完成作业。我真的很感激一些帮助。

以下是我必须创建的课程：

/**
 * Class for basic dog data: name, age, weight, breed and booster shot info.
 */
public class Dog {
    private String name; //name of dog
    private int age; //in years
    private double weight;  //in pounds
    private String breed; //breed of dog
    private boolean boosterShot; //Status of booster shot

    public Dog() {
        name = "No name yet.";
        age = 0;
        weight = 0;
        breed = "No breed yet.";
        this.boosterShot = false;
    }

    public Dog(String initialName, int initialAge,
               double initialWeight, String initialBreed, boolean boosterShot) {
        name = initialName;
        if ((initialAge < 0) || (initialWeight < 0)) {
            System.out.println("Error: Negative age or weight.");
            System.exit(0);
        } else {
            age = initialAge;
            weight = initialWeight;
            breed = initialBreed;
            this.boosterShot = boosterShot;
        }
    }

    public Dog(String initialName, String initialBreed, boolean boosterShot) {
        name = initialName;
        age = 0;
        weight = 0;
        breed = initialBreed;
        this.boosterShot = boosterShot;
    }

    public Dog(int initialAge) {
        name = "No name yet.";
        weight = 0;
        breed = "No breed yet.";
        boosterShot = false;
        if (initialAge < 0) {
            System.out.println("Error: Negative age.");
            System.exit(0);
        } else
            age = initialAge;
    }


    public Dog(double initialWeight) {
        name = "No name yet.";
        age = 0;
        breed = "No breed yet.";
        boosterShot = false;
        if (initialWeight < 0) {
            System.out.println("Error: Negative weight.");
            System.exit(0);
        } else
            weight = initialWeight;
    }

    public void setDog(String newName, int newAge,
                       double newWeight, String newBreed, boolean boosterShot) {
        name = newName;
        if ((newAge < 0) || (newWeight < 0)) {
            System.out.println("Error: Negative age or weight.");
            System.exit(0);
        } else {
            age = newAge;
            weight = newWeight;
            breed = newBreed;
            this.boosterShot = boosterShot;
        }
    }

    public boolean hadBoosterShot() {
        return this.boosterShot;
    }

    public String getName() {
        return name;
    }

    public void setName(String newName) {
        name = newName; //age and weight are unchanged.
    }

    public int getAge() {
        return age;
    }

    public void setAge(int newAge) {
        if (newAge < 0) {
            System.out.println("Error: Negative age.");
            System.exit(0);
        } else
            age = newAge; //name and weight are unchanged.
    }

    public double getWeight() {
        return weight;
    }

    public void setWeight(double newWeight) {
        if (newWeight < 0) {
            System.out.println("Error: Negative weight.");
            System.exit(0);
        } else
            weight = newWeight; //name and age are unchanged.
    }

    public String getBreed() {
        return breed;
    }

    public void setBreed(String newBreed) {
        breed = newBreed;
    }

    public boolean getBoosterShot() {
        return boosterShot;
    }

    public void setBoosterShot(boolean boosterShot) {
        this.boosterShot = boosterShot;
    }

    public void writeOutput() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age + " years");
        System.out.println("Weight: " + weight + " pounds");
        System.out.println("Breed: " + breed);
        System.out.println("Booster shot status: " + boosterShot);
    }
}

以下是我创建的测试人员程序：

import java.util.Scanner;

public class DogDemo {
    public static void main(String[] args) {
        Dog a = new Dog();
        System.out.println("My records on your dog are inaccurate.");
        System.out.println("Here is what they currently say:");
        a.writeOutput();

        Scanner keyboard = new Scanner(System.in);

        System.out.println("Please enter the correct dog name:");
        String correctName = keyboard.nextLine();
        a.setName(correctName);

        System.out.println("Please enter correct dog breed:");
        String correctBreed = keyboard.nextLine();
        a.setBreed(correctBreed);

        System.out.println("Please enter the correct dog age:");
        int correctAge = keyboard.nextInt();
        a.setAge(correctAge);

        System.out.println("Please enter the correct dog weight:");
        double correctWeight = keyboard.nextDouble();
        a.setWeight(correctWeight);

        System.out.println("My updated records now say:");
        a.writeOutput();
    }
}

一切正常，但我真的不知道如何在测试程序中将boosterShot设置为true或false。

非常感谢任何帮助。

Answer 1

你可以用它。试着询问狗是否是Boostershot

System.out.println("Is this Boostershot? Yes or No");

String ans = keyboard.nextLine();

if (ans.equals("Yes")) {
    a.setBoosterShot(true);
} else if (ans.equals("No")) {
    a.setBoosterShot(false);
} else {
    System.out.print("Please Input Yes or No");
}

Answer 2

尝试放置For循环。循环五次然后将所有2年以上的狗和booster = false放入狗列表中

import java.util.LinkedList;

import java.util.List;

import java.util.Scanner;

公共类示例{

 static List<Dog> dogList=new LinkedList<>();

 public static void main(String[] args) {

     for(int i=0;i<5;i++){

    Dog a = new Dog();

    System.out.println("My records on your dog are inaccurate.");

    System.out.println("Here is what they currently say:");

    a.writeOutput();

    Scanner keyboard = new Scanner(System.in);

    System.out.println("Please enter the correct dog name:");

    String correctName = keyboard.nextLine();

    a.setName(correctName);

    System.out.println("Please enter correct dog breed:");

    String correctBreed = keyboard.nextLine();

    a.setBreed(correctBreed);

    System.out.println("Please enter the correct dog age:");

    int correctAge = keyboard.nextInt();

    a.setAge(correctAge);

    System.out.println("Please enter the correct dog weight:");

    double correctWeight = keyboard.nextDouble();

    a.setWeight(correctWeight);

    System.out.println("My updated records now say:");

    a.writeOutput();

    if(a.getAge()>2&&!a.getBoosterShot()){

    dogList.add(a);

    }

     }

     System.out.println("\n");

     System.out.println("List of all dogs that are over two years old and have not had their booster shots");

     for(Dog d:dogList)

     {

     System.out.println(".................\n");

      System.out.println("Dog Name: "+d.getName());

      System.out.println("Dog Breed: "+d.getBreed());

      System.out.println("Dog Age: "+d.getAge());

     }

 }

}

Answer 3

一种可能性：

a.setBoosterShot（真）;

狗类Java分配

3 个答案: