因此，我正在开发一个健身应用程序，该应用程序将接收用户信息，并输出其燃烧的卡路里数量以及根据其BMI应遵循的饮食计划。好吧，到目前为止，我没有遇到任何麻烦，并且我根据ArrayList中的进餐计划保存了有关要吃哪种食物的所有信息。但是，我的代码无法打印出数组列表中的任何内容。我不知道该怎么办，我什至在互联网上查找东西，但有帮助。这不是重复的，请帮助我，我将非常感谢。
import java.util.Scanner;
import java.util.ArrayList;
import java.io.*;
import java.lang.Math;
import java.nio.file.Paths;
import java.nio.file.Files;
public class Project5
{
public static void main(String[] args) throws IOException
{
System.out.println("Welcome to the fitness app");
String name;
double weight;
double age;
int feet;
int inches;
double height;
String gender;
double bmi;
double rlweight;
double rhweight;
boolean launch;
double calories = 0.0;
String juice;
boolean x = true;
double inches2;
boolean underweight = false;
boolean normal = false;
boolean overweight = false;
boolean obese = false;
boolean xobese = false;
String status;
ArrayList<Food> n = new ArrayList<Food>();
addFoodsToListfast(n);
ArrayList<obx> obx = new ArrayList<obx>();
addFoodsToListslow(obx);
ArrayList<over> ov = new ArrayList<over>();
addFoodsToListmoderate(ov);
ArrayList<under> und = new ArrayList<under>();
addFoodsToListfour(und);
FileInputStream fileIn = new
FileInputStream("Foodstomaintainweight.txt");
Scanner foods = new Scanner(fileIn);
String[] foodss =
Files.lines（Paths.get（“ Foodstomaintainweight.txt”））。toArray（String [] :: new）;
Scanner input = new Scanner(System.in);
System.out.println("Please input your name: ");
name = input.nextLine();
System.out.println("How many feet are you?: ");
feet = input.nextInt();
System.out.println("How many inches are you?: ");
inches = input.nextInt();
height = ((feet * 12) + inches);
System.out.println("Please enter your weight: ");
weight = input.nextInt();
System.out.println("Please enter your age: ");
age = input.nextInt();
System.out.println("Please specify your gender: ");
gender = input.next();
System.out.println("Please tell me about your activity status is it
sedentary, moderate or active? ");
status = input.next();
if(gender.equals("Male") && status.equals("sedentary")){
calories = (10 * weight + 6.25 * height - 5 * age + 5) * 1.2;
//Math.round(calories);
System.out.println("You burn " + Math.round(calories) + "
calories everyday.");
}else if(gender.equals("Male") && status.equals("moderate")){
//calories = 10 * weight + 6.25 * height - 5 * age - 161;
calories = (10 * weight + 6.25 * height - 5 * age + 5) * 1.55;
System.out.println("You burn " + Math.round(calories) + "
calories everyday.");
}else if(gender.equals("Male") && status.equals("active")){
calories = (10 * weight + 6.25 * height - 5 * age + 5) * 1.725;
System.out.println("You burn " + Math.round(calories) + "
calories everyday.");
}else if(gender.equals("Female") && status.equals("sedentary")){
calories = (10 * weight + 6.25 * height - 5 * age - 161) * 1.2;
//Math.round(calories);
System.out.println("You burn " + Math.round(calories) + "
calories everyday.");
}else if(gender.equals("Female") && status.equals("moderate")){
//calories = 10 * weight + 6.25 * height - 5 * age - 161;
calories = (10 * weight + 6.25 * height - 5 * age - 161) * 1.55;
System.out.println("You burn " + Math.round(calories) + "
每天的卡路里。”）;
}else if(gender.equals("Female") && status.equals("active")){
calories = (10 * weight + 6.25 * height - 5 * age - 161) * 1.725;
System.out.println("You burn " + Math.round(calories) + "
calories everyday.");
}else{
System.out.println("Invalid Gender or Activity status.");
}
bmi = (weight) / (height * height) * 703;
if(age >= 18){
launch = true;
}else{
System.out.println("You are not old enough to use this app");
launch = false;
}
while(launch != false){
if(bmi > 30 && bmi < 35){
obese = true;
System.out.println("You are obese");
break;
}else if(bmi > 35){
xobese = true;
System.out.println("You are dangerously obese");
break;
}else if(bmi < 25 && bmi > 18.5 ) {
normal = true;
System.out.println("You are normal weight");
break;
}else if(bmi > 25 && bmi < 30){
overweight = true;
System.out.println("You are overweight");
break;
} else{
underweight = true;
System.out.println("You are underweight");
break;
}
}
String text4;
while(normal == true){
System.out.println("You are in good shape");
System.out.println("I can recommend you a list of foods you could eat to maintain your current weight.");
System.out.println("Would you like that? ");
text4 = input.next();
if(text4.equals("yes") || text4.equals("Yes") || text4.equals("YES")){
System.out.println("Alright then here is the list!");
for (int i =0; i < foodss.length; i ++){
System.out.println(foodss[i]);
}
break;
}else{
System.out.println("Ok thanks for using this app!!");
break;
}
}
String text;
while(underweight == true){
System.out.println("Looks like you are underweight");
System.out.println("Do you want to gain weight fast or slow? ");
text = input.next();
if(text.equals("fast") || text.equals("FAST") || text.equals("Fast")){
System.out.println("The amount of calories you should take everyday is " + Math.round(calories + 500) + " to gain weight");
System.out.println("I am going to recommend you a 3500 calorie diet plan ");
String output = "";
for(int i =0; i < und.size(); i++){
output = output + und.get(i);
}
System.out.println(output);
break;
} else{
System.out.println("Thanks for using the app!.");
}
}
String text1;
while(overweight == true){
System.out.println("Looks like you are overweight");
System.out.println("Do you want to lose weight? ");
text1 = input.next();
if(text1.equals("yes") || text1.equals("Yes") || text1.equals("YES")){
System.out.println("The amount of calories you should take everyday is " + Math.round(calories + 500) + " to gain weight");
break;
}
else{
System.out.println("Oh well good luck with life.");
}
}
String text2;
while(obese == true){
System.out.println("Looks like you are obese");
System.out.println("Do you want to lose weight? ");
text2 = input.next();
if(text2.equals("yes") || text2.equals("Yes") || text2.equals("YES")){
System.out.println("The amount of calories you should take everyday is " + Math.round(calories + 500) + " to gain weight");
break;
} else{
System.out.println("Oh well good luck with life.");
}
}
String text3;
while(xobese == true){
System.out.println("Looks like you are dangerously obese");
System.out.println("You should really consider losing weight or you will die!");
System.out.println("But STILL do you wanna lose weight?");
text3 = input.next();
if(text3.equals("yes") || text3.equals("Yes") || text3.equals("YES")){
System.out.println("The amount of calories you should take everyday is " + Math.round(calories + 500) + " to gain weight");
break;
} else{
System.out.println("Oh well good luck with life.");
}
}
}
public static void addFoodsToListslow(ArrayList<obx> obx)
{
Food butteredtoast = new Food("1-slice Buttered Toast", Food.meal.BREAKFAST, 150);
Food egg = new Food("1-Egg", Food.meal.BREAKFAST, 80);
Food Almonds = new Food("27-Almonds", Food.meal.BREAKFAST, 170);
Food banana = new Food("1-Large Banana", Food.meal.BREAKFAST, 90);
Food Greekyogurt = new Food("1-cup Greekyogurt", Food.meal.BREAKFAST, 120);
Food Blueberries = new Food("30-BlueBerries", Food.meal.BREAKFAST, 40);
Food grilledchicken = new Food("8-oz Grilled Chicken", Food.meal.LUNCH, 225);
Food Grilledvegetable = new Food("5 oz Grilled vegetable", Food.meal.LUNCH, 125);
Food Pasta = new Food("1/2 cup Pasta", Food.meal.LUNCH, 185);
Food Hummus = new Food("1-Dip Hummus", Food.meal.SNACK, 50);
Food BabyCarrot = new Food("5-Baby Carrots", Food.meal.SNACK, 35);
Food Crackers = new Food("5-Crackers", Food.meal.SNACK, 65);
Food salmon = new Food("7-ozSalmon", Food.meal.DINNER, 225);
Food brownrice = new Food("1-cup Brown Rice", Food.meal.DINNER, 175);
Food greenbeans = new Food("1/2 cup Green Beans", Food.meal.DINNER, 100);
}
public static void addFoodsToListfast(ArrayList<Food> n)
{
Food cereal = new Food("1 serving-All-bran cereal", Food.meal.BREAKFAST, 125);
Food milk = new Food("1cup-Milk", Food.meal.BREAKFAST, 50);
Food banana = new Food("1-Large Banana", Food.meal.BREAKFAST, 90);
Food cucumber = new Food("1-Large Cucumber", Food.meal.SNACK, 30);
Food avocadodip = new Food("Avocado Dip", Food.meal.SNACK, 50);
Food grilledcheese = new Food("Grilled Cheese with tomatoes", Food.meal.LUNCH, 300);
Food salad = new Food("Salad", Food.meal.LUNCH, 50);
Food Walnuts = new Food("10-Walnuts", Food.meal.SNACK, 100);
Food grilledchicken = new Food("8oz Grilled Chicken", Food.meal.LUNCH, 225);
Food BrusselSprouts = new Food("Brussel Sprouts", Food.meal.DINNER, 100);
Food Quinoa = new Food("Quinoa", Food.meal.DINNER, 105);
}
public static void addFoodsToListmoderate(ArrayList<over> ov)
{
Food Granola = new Food("1 Bar Granola", Food.meal.BREAKFAST, 120);
Food Greekyogurt = new Food("1 Cup Greekyogurt", Food.meal.BREAKFAST, 120);
Food Blueberries = new Food("15-BlueBerries", Food.meal.BREAKFAST, 40);
Food butteredtoast = new Food("1slice-Buttered Toast", Food.meal.BREAKFAST, 150);
Food orange = new Food("1-Orange", Food.meal.SNACK, 70);
Food chickenandveg = new Food("1-Cup Chicken and Vegetable Soup", Food.meal.LUNCH, 300);
Food Bread = new Food("2-Slice Bread", Food.meal.LUNCH, 100);
Food Apple = new Food("1-Apple", Food.meal.SNACK, 75);
Food PeanutButter = new Food("Peanut Butter", Food.meal.SNACK, 75);
Food Steak = new Food("5oz Steak", Food.meal.DINNER, 375);
Food Mashedpotatoes = new Food("1-Cup Mashedpotatoes", Food.meal.DINNER, 150);
Food Asparagus = new Food("Asparagus", Food.meal.DINNER, 75);
}
public static void addFoodsToListfour(ArrayList<under> und)
{
Food cereal = new Food("1-cup All-bran cereal", Food.meal.BREAKFAST, 125);
Food milk = new Food("1-cup Milk", Food.meal.BREAKFAST, 50);
Food banana = new Food("1-Large Banana", Food.meal.BREAKFAST, 90);
Food Greekyogurt = new Food("1-Cup Greekyogurt", Food.meal.BREAKFAST, 120);
Food Blueberries = new Food("40-BlueBerries", Food.meal.BREAKFAST, 200);
Food egg = new Food("2-Egg", Food.meal.BREAKFAST, 160);
Food Almonds = new Food("25-Almonds", Food.meal.BREAKFAST, 300);
Food Bread = new Food("3-Slices Bread", Food.meal.LUNCH, 200);
Food grilledchicken = new Food("10oz-Grilled Chicken", Food.meal.LUNCH, 225);
Food Grilledvegetable = new Food("Grilled vegetable", Food.meal.LUNCH, 125);
Food Pasta = new Food("1-Cup Pasta", Food.meal.LUNCH, 185);
Food Apple = new Food("2-Apple", Food.meal.SNACK, 150);
Food CheesePizza = new Food("2-Cheese Pizza", Food.meal.SNACK, 300);
Food Steak = new Food("9oz-Steak", Food.meal.DINNER, 375);
Food Mashedpotatoes = new Food("1cup-Mashedpotatoes", Food.meal.DINNER, 150);
Food brownrice = new Food("1 Cup-Brown Rice", Food.meal.DINNER, 175);
Food greenbeans = new Food("1Cup-Green Beans", Food.meal.DINNER, 100);
}
答案 0 :(得分：1)
在应该将内容添加到列表中的方法中，例如,，您没有在其中添加stuf，而只是初始化了一堆addFoodsToListfast对象。因此，在方法内部，当您声明Food对象时，必须将其添加到列表中，如下所示：
Food