让我头疼的构造函数 Java

Question

好吧，我卡在 4 和 5 还没有开始 6。不寻找任何人来做他们只是想在完成 4 和 5 时得到一些帮助，并可能对到目前为止的代码提供任何反馈。

1. 创建实例变量（属性） 为您的班级创建至少 3 个私有实例字段（属性） 您的字段必须至少使用 3 种不同的数据类型
2. 创建getter（访问器）和setter（修改器）方法 为每个实例变量创建一个 getter（访问器）方法 为每个实例变量创建一个 setter（mutator）方法
3. 创建一个显示数据的方法 创建一个名为 display 的方法，它只打印出对象的所有实例变量的值
4. 创建 2 个构造函数 创建一个默认构造函数（无参数），将所有实例变量分配给默认值 创建一个参数化构造函数，将所有实例变量作为参数，并将实例变量设置为参数提供的值

5. 测试你的程序 创建一个名为 Demo.java 的类。此类将包含您的主要方法 使用默认构造函数创建类的实例。 调用你所有的对象集方法来为你的对象赋值 调用对象显示方法，打印出它的值 使用参数化构造函数创建您的类的另一个实例 调用对象的显示方法，打印出它的值

   public class Coffee {
   
   //Instance Variables        
       private double sugar;
       private int milk;
       private boolean heat; 
   
   //Constructor       
       public Coffee (double id, int dairy, boolean temp )
       {
           sugar = id;
           milk = dairy;
           heat = temp;        
       }
   
   
   // (setter)
   
       public void setSugar(double id){
           sugar = id;
       }
       public void setMilk(int dairy){
           milk = dairy;
       }       
       public void setSize(boolean temp){
           heat = temp;
       }
       //(getter)  
       public double getSugar(){
           return sugar;
       }
   
       public int getMilk(){
           return milk;
       }
   
       public boolean temp(){
           return heat;
       }
       //Method to display data, (need to work on this)
       static void display()
       {
           System.out.println("You added +sugar+ tablespoons of sugar to your coffee");
           System.out.println("You have +dairyin your coffee");
           System.out.println("That's a +size+ ounce cup");
        }
        //Default Constructor (need help with setting heat to a default)       
        public Coffee() {
           sugar = 0;
           milk = 0;
          heat = 0;
        }  
   }
   

Answer 1

public class Coffee {

    //Instance Variables        
    private double sugar;
    private int milk;
    private boolean isHot; // renamed heat to isHot
    private int size;

    // Constructor       
    public Coffee (double id, int dairy, boolean temp ) {
        sugar = id;
        milk = dairy;
        heat = temp;        
    }

    // (setter)
    public void setSugar(double id) {
        this.sugar = id;
    }
    public void setMilk(int dairy) {
        this.milk = dairy;
    }       
    public void setSize(int size) {
        this.size = size;
    }

    public void setHeat(boolean isHot) {
        this.isHot = isHot;
    }

    //(getter)  
    public double getSugar() {
        return this.sugar;
    }

    public int getMilk() {
        return this.milk;
    }

    public boolean checkIfHot() {
        return this.isHot;
    }

    public int getSize() {
        return this.size;
    }

    // Method to display data, (need to work on this)
    static void display() {
        System.out.println("You added " + getSugar() + " tablespoons of sugar to your coffee");
        System.out.println("You have " + getMilk() + " in your coffee");
        System.out.println("That's a " + getSize() + " ounce cup");
        System.out.println("Is the cup hot? " + checkIfHot());
    }

    // Default Constructor (need help with setting heat to a default)       
    public Coffee() {
        sugar = 0.0;
        milk = 0;
        heat = false;
        size = 0;
    }  
}

给你。我已将您的布尔私有成员 heat 重命名为 isHot。