title: How to add data from another class to JTextField
body: <p>I have a Gadget, Mobile, MP3 and GadgetShop class. The Gadget is the super class, the Mobile and MP3 are Subclasses of the Superclass and the GadgetShop is the GUI I made.</p>
  
  <p>I just need my GadgetShop to gather the information to place it in the TextFields I've made when I click the button I've made. I have no idea how to pass the information.</p>
  
  <p>I'm using BlueJ by the way.</p>
  
  <p><strong>This is my Mobile Class:</strong></p>
  
  <pre><code>/**Mobile phone class that:
   * allows calling credit to be applied that is more than 0
   * shows remaining calling credit
   * allows a phone number to be added
   * shows duration of phone call 
   */
  public class Mobile extends Gadget
  {
      private int credit;
      private int duration;
      private String number = "";
  
      /**
      * Constructor for objects of class Mobile.
      */
      public Mobile(double ThePrice, int TheWeight, String TheModel, String TheSize) 
      {
          // initialise instance variables
          super(ThePrice, TheWeight, TheModel, TheSize);
      }
  
  
      /**
      * Insert the duration of the call.
      */
      public void insertDuration(int length)
      {
          System.out.println("A duration of " + length + " minutes for the phone call has been inserted!");
          duration = length;
      }
  
      /**
      * Insert the phone number.
      */
      public void insertNumber(String numberAdder)
      {
          System.out.println("The phone number " + numberAdder + " has been inserted!");
          number = numberAdder;
      }
  
      /**
      * Insert credit for the call.
      * A positive amount will need to be added in order for successfull credit to be applied,
      * otherwise an error message is displayed.
      */   
      public void insertCredit(int calls)
      {
          if(calls &gt; 0) {
              System.out.println("Successfully added " + calls + " pounds of credit!");
              credit = credit + calls;
          }
          else {
              System.out.println("You need to insert a positive amount more than " + credit + " pounds.");
      }
      }
  
      /**
      * Make the phone call.
      * If the credit is equal to or more than the duration, a message displays the phone number and duration of the call.
      * If the credit is 0, a message will be displayed to insert more than 0.
      * The number of minutes the call lasted is reduced by the amount that was available.
      */
      public void makePhoneCall()
      {
          if(credit == 0)
          System.out.println("Insert more than 0 credit to make a phone call!");
      else {
          if(credit &gt;= duration) {
          System.out.println("The phone number " + number + " has been dialed and is being called for " + duration + " minutes");
          credit = credit - duration;
          duration = 0;
      }
      else {
          if(credit &lt; duration)
          System.out.println("You do not have enough credit to make a phone call! Your credit is " + credit + " pounds");
      }
      }
      }
  
      public void mobilePrint()
      /**
      * Print the details of the mobile.
      **/
      {
         System.out.println("The price of the mobile is " + price + " pounds"); 
         System.out.println("The weight is " + weight + " grams");
         System.out.println("The model is " + model); 
         System.out.println("The size is " + size);
      }
  }
  </code></pre>
  
  <p><strong>This is my GadgetShop:</strong></p>
  
  <pre><code>import java.util.*;
  import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  import java.util.ArrayList;
  
  public class GadgetShop implements ActionListener
  {
      private JTextField model, price, weight, size, credit, memory, phoneNo, duration, download, displayNumber;
      private JButton addMobile, addMP3, clear, displayAll;
  
      //These JTextField's are for the labels
      private JTextField model2, price2, weight2, size2, credit2, memory2, phoneNo2, duration2, download2, displayNumber2;
  
      private JFrame frame;
      private ArrayList&lt;Gadget&gt; gadgetDetails;
  
      public GadgetShop()
      {
          makeFrame();
      }
  
      public void addGadget(Gadget newGadget)
      {
          ArrayList&lt;Gadget&gt; GadgetList = new ArrayList&lt;Gadget&gt;();
          Gadget Object = new Gadget(1.00,20,"model","big");
          GadgetList.add(Object);
          model.setText("hi");
      }
  
      public void makeFrame()
      {
          frame = new JFrame("Gadget Shop");
          Container contentPane = frame.getContentPane();
  
          model = new JTextField(10);
          price = new JTextField(10);
          weight = new JTextField(10);
          size = new JTextField(10);
          credit = new JTextField(10);
          memory = new JTextField(10);
          phoneNo = new JTextField(10);
          duration = new JTextField(10);
          download = new JTextField(10);
          displayNumber = new JTextField(10);
  
          //Display Model text box and model info    
          model2 = new JTextField("Model:");        
          contentPane.add(model2);
          model2.setOpaque(false);         
          contentPane.add(model);  
  
          price2 = new JTextField("Price:");
          contentPane.add(price2);
          price2.setOpaque(false);
          contentPane.add(price);
  
          weight2 = new JTextField("Weight:");
          contentPane.add(weight2);
          weight2.setOpaque(false);
          contentPane.add(weight);
  
          size2 = new JTextField("Size:");
          contentPane.add(size2);
          size2.setOpaque(false);
          contentPane.add(size);
  
          credit2 = new JTextField("Credit:");
          contentPane.add(credit2);
          credit2.setOpaque(false);
          contentPane.add(credit);
  
          memory2 = new JTextField("Memory:");
          contentPane.add(memory2);
          memory2.setOpaque(false);
          contentPane.add(memory);
  
          phoneNo2 = new JTextField("Phone Number:");
          contentPane.add(phoneNo2);
          phoneNo2.setOpaque(false);
          contentPane.add(phoneNo);
  
          duration2 = new JTextField("Duration:");
          contentPane.add(duration2);
          duration2.setOpaque(false);
          contentPane.add(duration);       
  
          download2 = new JTextField("Download:");
          contentPane.add(download2);
          download2.setOpaque(false);
          contentPane.add(download);
  
          displayNumber2 = new JTextField("Display Number:");
          contentPane.add(displayNumber2);
          displayNumber2.setOpaque(false);
          contentPane.add(displayNumber);
  
          addMobile = new JButton("Add Mobile Number");
          contentPane.add(addMobile);
          addMobile.addActionListener(this);
  
          addMP3 = new JButton("Add MP3 Song");
          contentPane.add(addMP3);
          addMP3.addActionListener(this);
  
          clear = new JButton("Clear");
          contentPane.add(clear);
          clear.addActionListener(this);
  
          displayAll = new JButton("Display All");
          contentPane.add(displayAll);
          displayAll.addActionListener(this);
  
          contentPane.setLayout (new GridLayout(4,4));
  
          frame.pack();
          frame.setVisible(true);
      }
  
          public void actionPerformed(ActionEvent event)
      {
          String command = event.getActionCommand();
          if (command.equals("Add Mobile Number")) {
              addMobile();
          }  
      }
  
      public void addMobile()
      {
          model.setText("");
      }
  
  
      public void clearText()
      {
          model.setText("");
          price.setText("");
          weight.setText("");
          size.setText("");
          credit.setText("");
          memory.setText("");
          phoneNo.setText("");
          duration.setText("");
          download.setText("");
          displayNumber.setText("");
      }
  }
  </code></pre>
  
  <p>Where I have the:</p>
  
  <pre><code>public void addMobile()
  {
      model.setText("");
  }
  </code></pre>
  
  <p>I want to add the details of the Mobile Phone</p>