Javaâ¢ Application Development on Linux - Dator

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384Chapter 17Other Ways: Alternatives to Swingdocumentation. 9 You might want to use that resource along with thislightweight tutorial to fill in the gaps and shortcuts.It should not be too surprising that there are similarities between SWT,AWT, and Swing. They all take different approaches to solving the sameproblem, namely how to control the complexity of a graphical event-drivenapplication. Because the problem is the same, there can’t help but be similaritiesbetween different solutions. By now you may have deduced that the Shellclass is an analog to the JFrame class, and that SWT uses a system of layoutmanagers not too different from Swing. If so, you are on the right track andwell on your way to using SWT.If we had to summarize the difference in approaches between SWT andSwing, it would be that SWT tries to provide a small number of complexclasses, and Swing tries to provide a large number of simpler classes. Obviously,this is a generalization, but everybody generalizes. Sorry.The Display is a class that provides the link to the underlying GUI system.Think of it as an abstraction of the interface to the windowing system. Inalmost all cases, an SWT application will have exactly one instance of Display.The Shell class represents a window. This class descends from a series ofabstract parent classes, so if you look at the Javadoc for Shell and think it issimple, be sure to drill down into those parent classes! We’ll discuss Shell quitea bit more as we go along.17.3PORTING BUDGETPRO TO SWTThe conversion of an existing application is a complex process. Always considerrewriting from scratch. Still, it is worthwhile to show an application convertedfrom Swing to SWT, because it will emphasize the relationship betweenthe two.We begin with the reobjecting. Starting with the BudgetPro class, weneed to add an instance of the Display class. Then the JFrame becomes aShell. Likewise, the JLabels become Labels. Then . . . Wait a minute. Youdon’t need a blow-by-blow account. Maybe it would be simpler to show youwhat SWT classes roughly correspond to the equivalent Swing classes(Table 17.1).9. http://download.eclipse.org/downloads/documentation/2.0/html/plugins/org.eclipse.platform.doc.isv/reference/api/
17.3 Porting BudgetPro to SWT385Table 17.1 Major SWT widgets and their Swing equivalentsSWT widgetButtonCanvasCaretComboCompositeGroupLabelListMenuMenuItemProgressBarScaleScrollBarAnalogous SwingcomponentJButtonjava.awt.Canvas,but see alsojava.awt.Graphics2Djavax.swing.text.CaretJComboBoxJPanelJPanelJLabelJListJMenuJMenuItemA,JCheckboxMenuitem,JRadioButtonMenuitemJProgressBarJSpinnerJScrollPaneDescriptionDisplay widget that sends notification whenpressed and/or released.Composite widget that provides a surface fordrawing arbitrary graphics. May be used tocreate custom widgets.A cursor used as the insertion point for text.Widget that permits the user to choose astring from a list of strings, or to enter a newvalue into a text field.Widget that is capable of containing otherwidgets.Composite widget that groups other widgetsand surrounds them with an etched borderand/or label.Nonselectable widget that displays an imageor a string.Selectable widget to choose a string or stringsfrom a list of strings.User interface widget that contains menuitems.Selectable widget that represents an item in amenu.Nonelectable widget that displays progress tothe user.Widget that represents a range of numericvalues.Widget that represents a range of positivenumeric values. Used in a Composite thathas V_SCROLL and/or H_SCROLL styles. Themapping to Swing is not very tight here, sinceJScrollPane is like a combination ofComposite and ScrollBar.
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Java Application
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Java Application
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To my mother, for her love of words
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viiiContents1.41.51.6Chapter 22.12.
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xContents5.65.75.85.95.105.115.125.
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xiiContentsChapter 99.19.29.39.49.5
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xivContentsChapter 1313.113.213.313
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xviContentsChapter 1717.117.217.317
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xviiiContents20.620.720.820.920.102
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PrefaceJAVA AND LINUXWhy another bo
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PrefacexxiiiFREE SOFTWARE AND JAVAG
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Prefacexxvand Tyrrell Albaugh, who
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xxviiiIntroductionIf you are an exp
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xxxIntroductionThe Linux Newbie Pat
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Part IGetting Started
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4Chapter 1An Embarrassment of Riche
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10Chapter 1An Embarrassment of Rich
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Chapter 2An Embarrassment of Riches
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2.2 Eye to Eye with vi35of their co
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2.2 Eye to Eye with vi37• L (“l
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2.2 Eye to Eye with vi39In both cas
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2.2 Eye to Eye with vi41• :7,.w!
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2.2 Eye to Eye with vi431,$s/Tryout
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2.3 Editors Galore45affected by thi
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2.3 Editors Galore47has a huge lear
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2.6 Resources49• fte is an editor
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52Chapter 3An Experienced Programme
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100Chapter 4Where Am I? Execution C
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116Chapter 5The Sun Microsystems Ja
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168Chapter 6The IBM Developer Kit f
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Chapter 7The GNU Compiler for Java(
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7.4 Compiling Our Simple Ap
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7.4 Compiling Our Simple Ap
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7.5 Options and Switches1857.5OPTIO
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7.9 What You Still Don’t Know187o
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Chapter 8Know What You Have:CVSSour
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8.2 Source Control: Whys and Hows19
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8.3 A GUI: jCVS211and the differenc
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8.4 Review213Figure 8.7 jCVS checko
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Chapter 9Ant:An IntroductionAnt 1 i
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9.3 Obtaining and Installing Ant217
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9.3 Obtaining and Installing Ant219
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9.4 A Sample Ant Buildfile221standa
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9.4 A Sample Ant Buildfile2239.4.2.
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9.4 A Sample Ant Buildfile225$ antB
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9.4 A Sample Ant Buildfile227debugI
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9.4 A Sample Ant Buildfile229Exampl
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9.4 A Sample Ant Buildfile231Runnin
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9.7 Resources233• O’Reilly has
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236Chapter 10Integrated Dev
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Chapter 11Balancing Acts:An Imagina
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11.3 How to Develop Software265soft
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11.4 What Makes a Good Requirement2
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11.6 Requirements for the Budget <s
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11.6 Requirements for the Budget <s
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11.7 Documenting, Prototyping, and
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11.7 Documenting, Prototyping, and
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11.11 Exercises277• http://www.pr
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Chapter 12Analysis and Design:Seeki
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12.4 Finding the Objects281Accounta
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12.5 Finding the Methods and Attrib
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12.6 Essential and Nonessential285
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12.7 Analysis Paralysis287• Class
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12.12 Resources28912.9CORE CLASSESS
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12.12 Resources291if (dbConn != nul
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12.13 Exercises293Example 12.2 The
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296Chapter 13JUnit: Automating Unit
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Chapter 14Storing the DataIn this c
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14.5 Oracle, PostgreSQL, MySQL31714
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14.7 Beyond the Basics319files, and
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14.7 Beyond the Basics321Hibernate
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14.9 Setting Up PostgreSQL for Budg
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14.10 Review32514.9.4 Straight JDBC
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Chapter 15Accessing the Data:An Int
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15.3 Making Connections329These thr
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15.3 Making Connections331Example 1
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19.3 How to Write a JSP App
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19.3 How to Write a JSP App
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19.5 Review439into JSP files. The m
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19.8 Exercises441To get it straight
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444Chapter 20Open Source Web <stron
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Part VDevelopingEnterprise Scale So
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474Chapter 21Introduction to Enterp
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494Chapter 22Building an EJBclasses
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496Chapter 22Building an EJBwhich,
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498Chapter 22Building an EJBExample
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500Chapter 22Building an EJBExample
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502Chapter 22Building an EJBIf you
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Chapter 23Deploying EJBsIn this cha
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23.2 Lend Me Your EAR: Enterprise P
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23.3 Deploying the EAR515automatic
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23.4 Maintaining a Distributed <str
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23.8 Resources519Ant and CVS and ho
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522Chapter 24Parting ShotsThe three
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524Chapter 24Parting ShotsPrentice
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526Appendix AASCII ChartInt Oct Hex
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528Appendix BA Java Swing GUI for B
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Appendix CGNUGeneral Public License
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C.2 Terms and Conditions for Copyin
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C.2 Terms and Conditions for Copyin
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C.3 NO WARRANTY545of this License,
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C.5 How to Apply These Terms to You
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550Index$ (dollar)in format fields,
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552Indexbreak statement, 67, 74-75b
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554IndexCVS_RSH environment variabl
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556IndexFfail(), 307false constant,
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558IndexIBM, 236, 377, 518Common Pu
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560IndexJNDI (Java Naming and Direc
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562IndexNetBeans (continued)running
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564IndexScrollBar class, 385search
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566IndexTable class, 386, 394-395ta
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