Java How to Program Fourth Edition - DCC

Chapter 16 Files and Streams 935
51
52 // register window listener for window closing event
53 addWindowListener(
54
55 // anonymous inner class to handle windowClosing event
56 new WindowAdapter() {
57
58 // add record in GUI, then close file
59 public void windowClosing( WindowEvent event )
60 {
61 if ( output != null )
62 addRecord();
63
64 closeFile();
65 }
66
67 } // end anonymous inner class
68
69 ); // end call to addWindowListener
70
71 // get reference to generic task button doTask2 in BankUI
72 enterButton = userInterface.getDoTask2Button();
73 enterButton.setText( "Enter" );
74 enterButton.setEnabled( false );
75
76 // register listener to call addRecord when button pressed
77 enterButton.addActionListener(
78
79 // anonymous inner class to handle enterButton event
80 new ActionListener() {
81
82 // add record to file
83 public void actionPerformed( ActionEvent event )
84 {
85 addRecord();
86 }
87
88 } // end anonymous inner class
89
90 ); // end call to addActionListener
91
92 setSize( 300, 150 );
93 show();
94 }
95
96 // enable user to choose file to open
97 private void openFile()
98 {
99 // display file dialog so user can select file
100 JFileChooser fileChooser = new JFileChooser();
101 fileChooser.setFileSelectionMode(
102 JFileChooser.FILES_ONLY );
103
Fig. Fig. 16.13 16.13 Writing data randomly to a random-access file (part 2 of 5).