实施处理食物食谱（名称、描述）的 Recipes class。 class 应该有一个添加（添加一个新的配方），

Question

我有点困惑，关于我是否存储了食谱名称“TükőrTojás”及其描述，因为即使我通过了添加测试部分的第一个测试，当涉及到时，删除部分，我第一次测试失败，我的数组大小更改为 2，我猜是因为那里的名称已经定义了吗？我是否必须以某种方式将已经定义的名称存储到我的数组列表中？如果我必须这样做，我应该怎么做？

public class Recipes {
/*
Implement the Recipes class, which handle food recipes (name, description).
The class should have an add (add a new recipe),
 */
    ArrayList<String> recipes = new ArrayList<>();
    public void add(String name, String desc)
    {   Collections.addAll(recipes,name,desc);
        System.out.println(recipes.get(0));
        System.out.println(recipes.get(1));
    }
    public void delete(String name)

    {  
        recipes.remove(name);
    }
}

@Test
    public void testDelete() {
        Recipes recipes = new Recipes();

        String name = "Tükörtojás";

        recipes.add(name, "1. Az olajat egy serpenyőben kellőképp felforrósítjuk és óvatosan beleütjük" +
                " a tojásokat.\r\n2. Keverés nélkül készre sütjük, míg a tojásfehérje megsül, de a sárgája" +
                " folyós marad.\r\n3. Hogy jobban átsüljön, a tojásfehérjét egy villa segítségével óvatosan" +
                " megmozgathatjuk.");

        assertEquals(1, recipes.recipes.size()); // The test i fail

        recipes.delete(name);

        assertEquals(0, recipes.recipes.size());
    }
    ```

Answer 1

您需要为 Recipe 创建一个 JavaBean 以将其与您的 ArrayList 一起使用，因此您可能 ArrayList<Recipe>.

而不是 ArrayList<String>

RecipeBean.java

对于这个例子，我将创建一个名为 RecipeBean 的 JavaBean，它将包含 Strings recipeName 和 recipeDescription

public class RecipeBean {

    private String recipeName = "", recipeDescription = "";

    public RecipeBean() {
    }

    public String getRecipeName() {
        return recipeName;
    }

    public void setRecipeName(String recipeName) {
        this.recipeName = recipeName;
    }

    public String getRecipeDescription() {
        return recipeDescription;
    }

    public void setRecipeDescription(String recipeDescription) {
        this.recipeDescription = recipeDescription;
    }

    public void clear() {
        this.recipeName = "";
        this.recipeDescription = "";
    }
}

上面的 class 将充当单个食谱的 Recipe 对象或项目。

Recipe.java

然后在你的 class 调用 Recipe.class 中我将声明 ArrayList 现在用 RecipeBean 而不是 String 以获得更多控制。

ArrayList<RecipeBean> recipes = new ArrayList();


import java.util.ArrayList;

public class Recipe {

    /*
    Implement the Recipes class, which handle food recipes (name, description). The class should have an add (add a new recipe)
    */

    ArrayList<RecipeBean> recipes = new ArrayList<>();

    /**
     * Function to add recipe to recipes ArrayList
     *
     * @param recipeName - Recipe Name
     * @param recipeDescription - Recipe Description
     */
    public void addRecipe(final String recipeName, final String recipeDescription) {
    
        System.out.println("Adding recipe : " + recipeName);

        RecipeBean recipeBean = new RecipeBean();

        recipeBean.setRecipeName(recipeName); // Set recipeName to JavaBean
        recipeBean.setRecipeDescription(recipeDescription); // Set recipeDescription to JavaBean

        // Check if ArrayList is null
        if (recipes != null) {
            recipes.add(recipeBean); // Add java bean to ArrayList
        }
    }

    /**
     * Function to delete recipe to recipes ArrayList
     *
     * @param recipeName - Recipe Name
     */
    public void deleteRecipe(final String recipeName) {

        System.out.println("Deleting recipe : " + recipeName);

        // Check if ArrayList is null
        if (recipes != null) {

            // Loop through ArrayList and remove current object if name matches passed parameter
            recipes.removeIf(recipe -> recipe.getRecipeName().equalsIgnoreCase(recipeName));
        }
    }
}

实施处理食物食谱（名称、描述）的 Recipes class。 class 应该有一个添加（添加一个新的配方），

Implement the Recipes class, which handle food recipes (name, description). The class should have an add (add a new recipe),

java

class

arraylist

RecipeBean.java

Recipe.java