Swing Interfaces with Sorting and Searching - Java Programming: Comprehensive Concepts and Techniques - page 450

Creating a Menu System for the Classics on DVD Program

Recall how the menu system specified in the requirements document included
a menu bar with two commands and drop-down lists. Later in the program, the
main() method will call a method named createMenuBar(). The createMenuBar()
method, as shown in Figure 7-17, will declare and construct instances of the
JMenuBar, two JMenu commands, and several JMenuItems. The createMenuBar()
method takes no arguments but returns a completed JMenuBar item.

32 //create the menu system

33 public JMenuBar createMenuBar ()

34 {

35 //create an instance of the menu

36 JMenuBar mnuBar = new JMenuBar () ;

37 setJMenuBar ( mnuBar ) ;

38
39 //construct and populate the File menu

40 JMenu mnuFile = new JMenu ( "File" , true ) ;

41 mnuFile.setMnemonic ( KeyEvent .VK_F ) ;

42 mnuFile.setDisplayedMnemonicIndex ( 0 ) ;

43 mnuBar.add ( mnuFile ) ;

44
45 JMenuItem mnuFileExit = new JMenuItem ( "Exit" ) ;

46 mnuFileExit.setMnemonic ( KeyEvent .VK_X ) ;

47 mnuFileExit.setDisplayedMnemonicIndex ( 1 ) ;

48 mnuFile.add ( mnuFileExit ) ;

49 mnuFileExit.setActionCommand ( "Exit" ) ;

50 mnuFileExit.addActionListener ( this ) ;

51
52 //construct and populate the Edit menu

53 JMenu mnuEdit = new JMenu ( "Edit" , true ) ;

54 mnuEdit.setMnemonic ( KeyEvent .VK_E ) ;

55 mnuEdit.setDisplayedMnemonicIndex ( 0 ) ;

56 mnuBar.add ( mnuEdit ) ;

57
58 JMenuItem mnuEditInsert = new JMenuItem ( "Insert New DVD" ) ;

59 mnuEditInsert.setMnemonic ( KeyEvent .VK_I ) ;

60 mnuEditInsert.setDisplayedMnemonicIndex ( 0 ) ;

61 mnuEdit.add ( mnuEditInsert ) ;

62 mnuEditInsert.setActionCommand ( "Insert" ) ;

63 mnuEditInsert.addActionListener ( this ) ;

64
65 JMenu mnuEditSearch = new JMenu ( "Search" ) ;

66 mnuEditSearch.setMnemonic ( KeyEvent .VK_R ) ;

67 mnuEditSearch.setDisplayedMnemonicIndex ( 3 ) ;

68 mnuEdit.add ( mnuEditSearch ) ;

69
70 JMenuItem mnuEditSearchByTitle = new JMenuItem ( "by Title" ) ;

71 mnuEditSearchByTitle.setMnemonic ( KeyEvent .VK_T ) ;

72 mnuEditSearchByTitle.setDisplayedMnemonicIndex ( 3 ) ;

73 mnuEditSearch.add ( mnuEditSearchByTitle ) ;

74 mnuEditSearchByTitle.setActionCommand ( "title" ) ;

75 mnuEditSearchByTitle.addActionListener ( this ) ;

76
77 JMenuItem mnuEditSearchByStudio = new JMenuItem ( "by Studio" ) ;

78 mnuEditSearchByStudio.setMnemonic ( KeyEvent .VK_S ) ;

79 mnuEditSearchByStudio.setDisplayedMnemonicIndex ( 3 ) ;

80 mnuEditSearch.add ( mnuEditSearchByStudio ) ;

81 mnuEditSearchByStudio.setActionCommand ( "studio" ) ;

82 mnuEditSearchByStudio.addActionListener ( this ) ;

83
84 JMenuItem mnuEditSearchByYear = new JMenuItem ( "by Year" ) ;

85 mnuEditSearchByYear.setMnemonic ( KeyEvent .VK_Y ) ;

86 mnuEditSearchByYear.setDisplayedMnemonicIndex ( 3 ) ;

87 mnuEditSearch.add ( mnuEditSearchByYear ) ;

88 mnuEditSearchByYear.setActionCommand ( "year" ) ;

89 mnuEditSearchByYear.addActionListener ( this ) ;

90
91 return mnuBar;

92 }

93

FIGURE 7-17