shippinghub.java

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// Tutorial 19: ShippingHub.java
// This application tracks Parcels that pass through a shipping hub.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.TitledBorder;

public class ShippingHub extends JFrame
{
   // JLabel and JTextField to display time of arrival
   private JLabel arrivedAtJLabel;
   private JTextField arrivedAtJTextField;

   // JPanel to contain Parcel information
   private JPanel parcelInformationJPanel;

   // JLabel and JTextField to display Parcel identification number
   private JLabel parcelIDJLabel;
   private JTextField parcelIDJTextField;
   
   // JLabel and JTextField for name
   private JLabel nameJLabel;
   private JTextField nameJTextField;
   
   // JLabel and JTextField for address
   private JLabel addressJLabel;
   private JTextField addressJTextField;

   // JLabel and JTextField for city
   private JLabel cityJLabel;
   private JTextField cityJTextField;

   // JLabel and JTextField for state
   private JLabel stateJLabel;
   private JComboBox stateJComboBox;

   // JLabel and JTextField for zip code
   private JLabel zipJLabel;
   private JTextField zipJTextField;

   // JPanel for Parcel number by state
   private JPanel parcelStateJPanel;

   // JComboBox, JList and JScrollPane for Parcel number
   private JComboBox parcelStateJComboBox;

   // JButtons to manipulate Parcels
   private JButton scanNewJButton;
   private JButton addJButton;
   private JButton removeJButton;
   private JButton editJButton;
   private JButton updateJButton;
   private JButton backJButton;
   private JButton nextJButton;

   // array contains options for stateJComboBox
   private String[] states = { "AL", "FL", "GA", "KY", "MS", "NC",
      "SC", "TN", "VA", "WV" };

   // Parcel object contains data for newly entered Parcels
   private Parcel newParcel;

   private int parcelID = 0; // ID for new Parcels

   // position used to track location when the user is
   // browsing through the list of Parcels
   private int position = 0;
   
   // no-argument constructor
   public ShippingHub()
   {
      createUserInterface();
   }
   
   // create and position GUI components; register event handlers
   private void createUserInterface()
   {
      // get content pane for attaching GUI components
      Container contentPane = getContentPane();

      // enable explicit positioning of GUI components 
      contentPane.setLayout( null );

      // set up arrivedAtJLabel
      arrivedAtJLabel = new JLabel();
      arrivedAtJLabel.setBounds( 19, 14, 74, 24 );
      arrivedAtJLabel.setText( "Arrived at:" );
      contentPane.add( arrivedAtJLabel );
      
      // set up arrivedAtJTextField
      arrivedAtJTextField = new JTextField();
      arrivedAtJTextField.setBounds( 89, 14, 207, 21 );
      arrivedAtJTextField.setEditable( false );
      contentPane.add( arrivedAtJTextField );
      
      // set up parcelInformationJPanel
      parcelInformationJPanel = new JPanel();
      parcelInformationJPanel.setBounds( 9, 51, 490, 178 );
      parcelInformationJPanel.setBorder(
         new TitledBorder( "Parcel Information" ) );
      parcelInformationJPanel.setLayout( null );
      contentPane.add( parcelInformationJPanel );
      
      // set up parcelIDJLabel
      parcelIDJLabel = new JLabel();
      parcelIDJLabel.setBounds( 15, 27, 84, 24 );
      parcelIDJLabel.setText( "Parcel ID:" );
      parcelInformationJPanel.add( parcelIDJLabel );
      
      // set up parcelIDJTextField
      parcelIDJTextField = new JTextField();
      parcelIDJTextField.setBounds( 80, 27, 386, 21 );
      parcelIDJTextField.setEditable( false );
      parcelInformationJPanel.add( parcelIDJTextField );
      
      // set up nameJLabel
      nameJLabel = new JLabel();
      nameJLabel.setBounds( 15, 65, 66, 25 );
      nameJLabel.setText( "Name:" );
      parcelInformationJPanel.add( nameJLabel );

      // set up nameJTextField
      nameJTextField = new JTextField();
      nameJTextField.setBounds( 80, 65, 386, 21 );
      nameJTextField.setEditable( false );
      parcelInformationJPanel.add( nameJTextField );
	  
      // set up addressJLabel
      addressJLabel = new JLabel();
      addressJLabel.setBounds( 15, 103, 66, 25 );
      addressJLabel.setText( "Address:" );
      parcelInformationJPanel.add( addressJLabel );

      // set up addressJTextField
      addressJTextField = new JTextField();
      addressJTextField.setBounds( 80, 103, 386, 21 );
      addressJTextField.setEditable( false );
      parcelInformationJPanel.add( addressJTextField );
      
      // set up cityJLabel
      cityJLabel = new JLabel();
      cityJLabel.setBounds( 15, 141, 37, 24 );
      cityJLabel.setText( "City:" );
      parcelInformationJPanel.add( cityJLabel );
      
      // set up cityJTextField
      cityJTextField = new JTextField();
      cityJTextField.setBounds( 80, 141, 117, 21 );
      cityJTextField.setEditable( false );
      parcelInformationJPanel.add( cityJTextField );
      
      // set up stateJLabel
      stateJLabel = new JLabel();
      stateJLabel.setBounds( 215, 141, 47, 24 );
      stateJLabel.setText( "State:" );
      parcelInformationJPanel.add( stateJLabel );
      
      // set up stateJComboBox
      stateJComboBox = new JComboBox( states );
      stateJComboBox.setBounds( 260, 141, 70, 21 );
      stateJComboBox.setEnabled( false );
      parcelInformationJPanel.add( stateJComboBox );
      
      // set up zipJLabel
      zipJLabel = new JLabel();
      zipJLabel.setBounds( 355, 141, 28, 24 );
      zipJLabel.setText( "Zip:" );
      parcelInformationJPanel.add( zipJLabel );
      
      // set up zipJTextField
      zipJTextField = new JTextField();
      zipJTextField.setBounds( 390, 141, 76, 21 );
      zipJTextField.setEditable( false );
      parcelInformationJPanel.add( zipJTextField );

      // set up parcelStateJPanel
      parcelStateJPanel = new JPanel();
      parcelStateJPanel.setBounds( 508, 51, 136, 178 );
      parcelStateJPanel.setBorder(
         new TitledBorder( "Parcels by State" ) );
      parcelStateJPanel.setLayout( null );
      contentPane.add( parcelStateJPanel );
      
      // set up parcelStateJComboBox
      parcelStateJComboBox = new JComboBox( states );
      parcelStateJComboBox.setBounds( 19, 29, 98, 21 );
      parcelStateJPanel.add( parcelStateJComboBox );
      parcelStateJComboBox.addActionListener(
         
         new ActionListener() // anonymous inner class
         {
            // event handler called when parcelStateJComboBox
            // is selected
            public void actionPerformed( ActionEvent event )
            {
               parcelStateJComboBoxActionPerformed( event );
            }
            
         } // end anonymous inner class
         
      ); // end call to addActionListener

      // set up parcelStateJScrollPane
      parcelStateJScrollPane.setBounds( 19, 65, 98, 82 );
      parcelStateJPanel.add( parcelStateJScrollPane );

      // set up scanNewJButton
      scanNewJButton = new JButton();
      scanNewJButton.setBounds( 9, 248, 95, 26 );
      scanNewJButton.setText( "Scan New" );
      contentPane.add( scanNewJButton );
      scanNewJButton.addActionListener( 
      
         new ActionListener() // anonymous inner class
         {
            // event handler called when scanNewJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               scanNewJButtonActionPerformed( event );
            }
            
         } // end anonymous inner class
         
      ); // end call to addActionListener

      // set up addJButton
      addJButton = new JButton();
      addJButton.setBounds( 109, 248, 85, 26 );
      addJButton.setText( "Add" );
      addJButton.setEnabled( false );
      contentPane.add( addJButton );
      addJButton.addActionListener( 
      
         new ActionListener() // anonymous inner class
         {
            // event handler called when addJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               addJButtonActionPerformed( event );
            }
            
         } // end anonymous inner class
         
      ); // end call to addActionListener

      // set up removeJButton
      removeJButton = new JButton();
      removeJButton.setBounds( 199, 248, 85, 26 );
      removeJButton.setText( "Remove" );
      removeJButton.setEnabled( false );
      contentPane.add( removeJButton );
      removeJButton.addActionListener( 
      
         new ActionListener() // anonymous inner class
         {
            // event handler called when removeJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               removeJButtonActionPerformed( event );
            }
            
         } // end anonymous inner class
         
      ); // end call to addActionListener

      // set up editJButton
      editJButton = new JButton();
      editJButton.setBounds( 289, 248, 85, 26 );
      editJButton.setText( "Edit" );
      editJButton.setEnabled( false );
      contentPane.add( editJButton );
      editJButton.addActionListener( 
      
         new ActionListener() // anonymous inner class
         {
            // event handler called when editJButton is pressed
            public void actionPerformed( ActionEvent event )
            {
               editJButtonActionPerformed( event );
            }
            
         } // end anonymous inner class