Java How to Program Fourth Edition - DCC

940 Files and Streams Chapter 16
35 // register listener to call openFile when button pressed
36 openButton.addActionListener(
37
38 // anonymous inner class to handle openButton event
39 new ActionListener() {
40
41 // enable user to select file to open
42 public void actionPerformed( ActionEvent event )
43 {
44 openFile();
45 }
46
47 } // end anonymous inner class
48
49 ); // end call to addActionListener
50
51 // configure generic doTask2 button from BankUI
52 nextButton = userInterface.getDoTask2Button();
53 nextButton.setText( "Next" );
54 nextButton.setEnabled( false );
55
56 // register listener to call readRecord when button pressed
57 nextButton.addActionListener(
58
59 // anonymous inner class to handle nextButton event
60 new ActionListener() {
61
62 // read a record when user clicks nextButton
63 public void actionPerformed( ActionEvent event )
64 {
65 readRecord();
66 }
67
68 } // end anonymous inner class
69
70 ); // end call to addActionListener
71
72 // register listener for window closing event
73 addWindowListener(
74
75 // anonymous inner class to handle windowClosing event
76 new WindowAdapter() {
77
78 // close file and terminate application
79 public void windowClosing( WindowEvent event )
80 {
81 closeFile();
82 }
83
84 } // end anonymous inner class
85
86 ); // end call to addWindowListener
87
Fig. Fig. 16.14 16.14 Reading a random-access file sequentially (part 2 of 5).