title: search function issue
body: <p>I have a search function within my program that looks for the name or a person within my arraylist. This can find the name of the person, but I am unable to get the other information I need. I'm guessing it's because I have not declared something. I am uncertain of how to proceed.</p>
  
  <p>First class which holds my methods.</p>
  
  <pre><code>public String searchName(String guest)
  {
    for (Booking s : bookings)
    {
        if (s.getGuest().equals(guest))
          return guest + " is in room " + roomID + "\n"; 
    }
    return guest + " is not booking in at the hostel";
  }
  </code></pre>
  
  <p>My Second class is my GUI that calls the methods</p>
  
  <pre><code>else if (item.equals("Find Room"))
  {
    String name = JOptionPane.showInputDialog(this, 
                      "Enter Guests Name",
                      "Find Room",
                      JOptionPane.QUESTION_MESSAGE);   
    output.setText( hostel.searchName(name));
  }
  </code></pre>
  
  <p>I am able to search for a persons name and if it's correct it will be found and draw the message into my JTextArea successfully. It will not display the <code>roomID</code> though, it just comes up with <code>null</code>. I'm confused I get no error messages and <code>null</code> is normaly associated with ints not Strings?</p>
  
  <p>Full Code if needed GUI CLASS</p>
  
  <pre><code>import java.awt.*;
  import java.awt.event.*;
  import javax.swing.*;
  
  public class GUI extends JFrame implements ActionListener 
  {
   private HostelFile hostel;
   private JPanel textOutput;
   private JScrollPane scroller;
   private JButton listFreeButton = new JButton("List Free Rooms");
   private JButton newBookingButton = new JButton("New Booking");
   private JButton cancelBookingButton = new JButton("Cancel Booking");
   private JButton listAllButton = new JButton("List All Bookings");   
   private JButton allRoomsButton = new JButton("List All Room Details");
   private JButton findRoomButton = new JButton("Find Room");
   private JButton exitButton = new JButton("Exit System");
   private JTextArea output = new JTextArea(30,30);
  
   public GUI(String hostelName)
   {
       super(hostelName);
       hostel = new HostelFile(hostelName);
       makeFrame();
       showFrame();
   }
  
   public void showFrame()    
   {   
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     
      setSize(800,600);
      setVisible(true);
   }
  
   public void makeFrame()    
   {
      JPanel buttonPanel = new JPanel();               
      buttonPanel.setLayout(new GridLayout(10,10,10,10));
      buttonPanel.setBorder(BorderFactory.createEtchedBorder());        
      buttonPanel.add(listFreeButton);
      buttonPanel.add(newBookingButton);
      buttonPanel.add(cancelBookingButton);
      buttonPanel.add(listAllButton);
      buttonPanel.add(allRoomsButton);
      buttonPanel.add(findRoomButton);
      buttonPanel.add(exitButton);
  
      textOutput = new JPanel();
      textOutput.setLayout(new BorderLayout());
      textOutput.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
  
      output.setEditable(false);
      scroller = new JScrollPane(output);     
      textOutput.add(scroller);
  
      add(buttonPanel,BorderLayout.WEST);
      add(textOutput,BorderLayout.CENTER);
  
      listFreeButton.addActionListener(this);
      newBookingButton.addActionListener(this);
      cancelBookingButton.addActionListener(this);
      listAllButton.addActionListener(this);
      allRoomsButton.addActionListener(this);
      findRoomButton.addActionListener(this);
      exitButton.addActionListener(this);
   }
  
   public void actionPerformed( ActionEvent ae)    
   {
      String item = ae.getActionCommand(); 
  
      if (item.equals("List Free Rooms"))
      {
      }
      else if (item.equals("New Booking"))
      {
          AddBooking bookingGUI = new AddBooking(this);
      }
      else if (item.equals("Cancel Booking"))
      {
      }
      else if (item.equals("List All Bookings"))
      {
          output.setText(hostel.getAllBookings());
      }
      else if (item.equals("List All Room Details"))
      {
      }
      else if (item.equals("Find Room"))
      {
          String name = JOptionPane.showInputDialog(this, 
                                    "Enter Guests Name",
                                    "Find Room",
                                    JOptionPane.QUESTION_MESSAGE);   
          output.setText( hostel.searchName(name));
      }
      else if (item.equals("Exit System"))
      {
          hostel.saveListBookings();
          System.exit(0);
      }
   }
  
  
   public void addBooking(String roomID, String roomType, String guest)
   {
      output.setText(hostel.addBooking(roomID,roomType,guest));
   }
  }
  </code></pre>
  
  <p>full code for methods</p>
  
  <pre><code>import java.util.*;
  public class ListBookings
  {
   private String hostelName;
   private ArrayList&lt;Booking&gt; bookings;
   private String roomID;
   private String roomType;
   private boolean ensuite;
   private String guest;
   private String nights;
   private String booked;
   /**
    * constructs objects for GUI
    */
  
   public ListBookings(String hostelName)
   {
      this.hostelName = hostelName;
      bookings = new ArrayList&lt;Booking&gt;();
   }
  
   public String getHostelName()
   {
      return hostelName;
   }
  
   public String addBooking(String roomID, String roomType, String guest)
   {
      if (roomID.equals(""))
          return "Error Please Entre Room ID";
  
      else if (roomType.equals(""))
          return "Error Please Entre Room Type";
  
      else if (guest.equals(""))
          return "Error Please Entre Guest Name";
  
      bookings.add(new Booking(roomID,roomType,guest));
      return "Room " + roomID + " " + roomType + " Has Been Booked For " + guest;
   }
  
   public String getAllBookings()
   {
      if (bookings.size() &gt; 0)
      {
          String allBookings = "";
          for (Booking s : bookings)
          {
              allBookings = allBookings + s.getRoomID() + " " + s.getRoomType() + " " + s.getGuest() + "\n";
          }
          return allBookings;
      }
      else 
      {
          return "Bookings are Empty";
      }
   }
  
   public String searchName(String guest)
   {
      for (Booking s : bookings)
      {
          if (s.getGuest().equals(guest))
          return guest + " is in room " + roomID + "\n"; 
      }
      return guest + " is not booking in at the hostel";
   }
  
   public String deleteBooking(String roomID)
   {
      int index = 0;
      for ( Booking s : bookings )
      {
          if ( s.getRoomID().equals(roomID))
          {
              return "Room ID: " + roomID + " Room Type: " + roomType + " Guest: " + guest;
              //students.remove(index);
              //return name + " removed from  module " + moduleName + "\n";
          }
          index++;
      }
      return  "  Cannot find " + roomID + "\n";
   }
  }
  </code></pre>
  
  <p>HostelFile </p>
  
  <pre><code>import java.util.*;
  import java.io.*;
  public class HostelFile extends ListBookings
  {
   public HostelFile(String hostelName)
   {
      super(hostelName);
      readListBookings(hostelName);
   }
  
   private void readListBookings(String fileName)
   {
      String roomID;
      String roomType;
      String guest;
      try
      {
          Scanner fileScanner = new Scanner( new File ( fileName + ".txt"));
          while (fileScanner.hasNext())
          {
              roomID = fileScanner.next();
              roomType = fileScanner.next();
              guest = fileScanner.next();
              addBooking(roomID,roomType,guest);
          }
          fileScanner.close();
      }
      catch (IOException e)
      {
          System.out.println("File not found");
      }
   }
  
  
   public void saveListBookings()
   {
      String fileName = getHostelName() +".txt" ;  
      try { 
        PrintWriter print = new PrintWriter( 
                    new BufferedWriter( 
                               new FileWriter( fileName ) ) ); 
  
        print.println(getAllBookings());
        print.close();
      } 
      catch ( IOException iox ) {
         System.out.println("Problem writing " + fileName ); 
      }
   }             
  }
  </code></pre>