Javaâ¢ Application Development on Linux - Dator

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386Chapter 17Other Ways: Alternatives to SwingTable 17.1 (Continued)SWT widgetAnalogous SwingcomponentDescriptionShellSliderTabFolderTabItemTableTableColumnTableItemTextToolBarToolItemTreeTreeItemJPanelJSliderJTabPaneAny JComponentJTableJTableColumnor instance ofTableColumnModelTableCellRenderer orTableCellEditorJTextField,JPasswordField,JFormattedTextField,JTextArea,JEditorPane, JTextPaneJButtonJTreeMutableTreeNodeWindow that is managed by the OS windowmanager. A Shell may be a child of aDisplay or another shell.Widget that represents a range of numericvalues. Differs from a Scale by having a“thumb” to change the value along the range.Composite widget that groups pages that canbe selected by the user using labeled tabs.Selectable user interface object correspondingto a tab for a page in a tab folder.A selectable widget that displays a list of tableitems that can be selected by the user. Rowsare items, columns are attributes of items.Selectable widget that represents a column ina table.Selectable widget that represents an item in atable.Editable widget that allows the user to typetext into it.Composite widget that supports the layout ofselectable toolbar items.Selectable widget that represents an item in atoolbar.A selectable widget that displays a hierarchicallist of user-selectable tree items.Selectable user interface object that representsa hierarchy of items in a tree.
17.3 Porting BudgetPro to SWT387We are going to walk you through converting only one of the GUI sourcefiles for the BudgetPro application. We will leave converting the rest as an exercisefor you. We’ll talk about some of the entertaining differences between themodels. As you shall see, there is no clear “winner” here between SWT andSwing. Almost all technical choices—SWT versus Swing, Java versus C++,Emacs versus vi, or for that matter UNIX versus Windows—are tradeoffs. Thisis no exception. There are things we like about SWT. For simple GUI applications,we think it is easier to set up and use. We think it is easier to learn in itsentirety than Swing. Swing, on the other hand, is more complete, offeringclasses that will do more than SWT. So the best solution depends (as always)on your requirements.17.3.1 Step 1: Convert the Class MembersWe are going to tackle converting BudgetPro.java from Swing to SWT. Inreal life, this is an exercise you are unlikely to have to carry out. You will morelikely write your GUI applications from scratch. But going through the conversionprovides a useful roadmap for talking about the architecture of SWT; itteaches you SWT in terms of a class library with which you are already familiar.First off, we change the packages imported at the start of the file. Removeall of the awt and swing packages. If you are using an IDE, this should flagevery single line of code that touches the GUI as an error. This can be a bighelp when you are doing a mass conversion like this. When you have killed allthe compile errors, you know you are well on your way to completing theconversion.Replace the import statements with the imports you are likely to need foryour SWT application. These are:import org.eclipse.swt.*;// The static SWT class, which contains a number of constants.import org.eclipse.swt.widgets.*;// The widgets library. Almost all your display elements are here.import org.eclipse.swt.events.*; // Event handlersimport org.eclipse.swt.layout.*; // Layout managersWe will go into these families of classes in more detail as we convert themembers and methods of BudgetPro.java.
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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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15.4 Querying Data333// queryString
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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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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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