Java How to Program Fourth Edition - DCC

Chapter 16 Files and Streams 909
13 // Deitel packages
14 import com.deitel.jhtp4.ch16.BankUI;
15 import com.deitel.jhtp4.ch16.AccountRecord;
16
17 public class CreateSequentialFile extends JFrame {
18 private ObjectOutputStream output;
19 private BankUI userInterface;
20 private JButton enterButton, openButton;
21
22 // set up GUI
23 public CreateSequentialFile()
24 {
25 super( "Creating a Sequential File of Objects" );
26
27 // create instance of reusable user interface
28 userInterface = new BankUI( 4 ); // four textfields
29 getContentPane().add(
30 userInterface, BorderLayout.CENTER );
31
32 // get reference to generic task button doTask1 in BankUI
33 // and configure button for use in this program
34 openButton = userInterface.getDoTask1Button();
35 openButton.setText( "Save into File ..." );
36
37 // register listener to call openFile when button pressed
38 openButton.addActionListener(
39
40 // anonymous inner class to handle openButton event
41 new ActionListener() {
42
43 // call openFile when button pressed
44 public void actionPerformed( ActionEvent event )
45 {
46 openFile();
47 }
48
49 } // end anonymous inner class
50
51 ); // end call to addActionListener
52
53 // get reference to generic task button doTask2 in BankUI
54 // and configure button for use in this program
55 enterButton = userInterface.getDoTask2Button();
56 enterButton.setText( "Enter" );
57 enterButton.setEnabled( false ); // disable button
58
59 // register listener to call addRecord when button pressed
60 enterButton.addActionListener(
61
62 // anonymous inner class to handle enterButton event
63 new ActionListener() {
64
Fig. Fig. 16.6 16.6 16.6 Creating a sequential file (part 2 of 6).