java - 打印数组中对象的单个元素。 java

Question

尝试将对象存储在数组中并稍后将其打印出来。继续获取内存中的实际位置。我一辈子都不记得如何打印内容而不是位置。

case VIEW_RECIPE:
            System.out.println("Please enter the recipe ID:");
            searchIndex = input.nextInt();
            System.out.println(recipeArray[searchIndex-1]);
            break;
case CREATE_RECIPE:
            Recipe recipe = new Recipe();
            recipeArray[recipe.getRecipeId() -1] = recipe; //-1 to store in element 0;
            break;

假设在recipeArray[]的索引0处有一个菜谱，我该如何打印它。这段代码只给我内存位置，循环是不切实际的。

尝试了代码

System.out.println(Arrays.toString(recipeArray[searchIndex-1]));

但它说 toString 应该是 deepToString，或者数组应该很长。

编辑:在被要求提供配方类后，它是

package potluck;
import java.util.*;


public class Recipe {

private int recipeId = 0;
private Scanner input = new Scanner(System.in);
private String attribution; 
private String dateAdded;
private String category;
private String listOfIngredients; 
private String tags;
private String steps;  
private String comments; 


public Recipe(){ //constructor
    recipeId += 1;
    setAttribution(); 
    setDateAdded();
    setCategory();
    setListOfIngredients(); 
    setTags();
    setSteps();
    System.out.println("Thank you for the recipe, it's Id is "+recipeId);
    System.out.println("Use this to find it later.");
    System.out.println();
}

其他都是 getter 和 setter

Answer 1

您应该重写 Recipe 类中的 toString() 方法。例如:

class Recipe {
    private int id;
    private String name;

    public String toString() {
        return "Recipe#" + id + ": " + name;
    }
}