Hello guys I started a personal project to where I would basically make a meal planner based of how many calories a person wants to consume per day for myself. I know it maybe a tough challenge for me since I'm a beginner, but I can do it! I will leave the backend later, but for now I wanted to work on the UI and I'm having trouble with this piece of code. I want to make a list of panels to be held in a panel, based on how many number of meals they want is how many panels will appear. any insight on this will be much appreciated.   package mealplanner;  import javax.swing.*;  /**  * Created by Usman on 6/8/2017.  */ public class MealPlannerPanel extends JPanel {      JPanel[] panel;     int mealsPerDay, caloriesPerDay;     public MealPlannerPanel(){         mealsPerDay = Integer.parseInt(JOptionPane.showInputDialog("How many meals would you like per day?",null));         caloriesPerDay = Integer.parseInt(JOptionPane.showInputDialog("What is your daily calorie aim?",null));         panel = new JPanel[mealsPerDay];         for(int i = 0; i &lt; panel.length; i++){             add(panel[i]);         }     }     public static void main(String[] args){         MealPlannerPanel planner = new MealPlannerPanel();         JFrame frame = new JFrame("Meal Planner");         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);         frame.getContentPane().add(planner);         frame.pack();         frame.setVisible(true);     } }
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