Javaâ¢ Application Development on Linux - Dator

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382Chapter 17Other Ways: Alternatives to SwingExample 17.1 A simple SWT applicationimport org.eclipse.swt.*;import org.eclipse.swt.layout.*;import org.eclipse.swt.widgets.*;/*** @author mschwarz** Sample SWT "Hello, world" application*/public class SWTHelloWorld {public static void main(String[] args) {Display disp = new Display();Shell window = new Shell(disp);window.setLayout(new RowLayout());Label label = new Label(window, SWT.NONE);label.setText("Hello, world.");window.setSize(320,160);window.open();while (!window.isDisposed()) {if (!disp.readAndDispatch()) {disp.sleep();}}}}disp.dispose();3. Extract the SWT JAR files.4. Extract the SWT JNI files.5. Configure your development environment.Let’s go over these in a bit more detail.SWT was developed as a GUI library for the Eclipse project. It is distributedas part of Eclipse. There is no official standalone SWT package. The rightway to obtain SWT is to download and (at least temporarily) install the EclipseSDK. See Section 10.4 for details.
17.2 The IBM SWT Toolkit383Figure 17.1 Running the SWT version of “Hello, world”If you have followed our sage advice and downloaded the GTKversion of the Eclipse SDK, then you need to copy out the SWT JAR files.There are two files in the GTK version, and just one in the Motif version. TheGTK version’s files are swt.jar and swt-pi.jar. They are both in theeclipse/plugins/org.eclipse.swt.gtk_2.1.2/ws/gtk directory. Youwill need to have both of these JAR files on the classpath of any SWTapplication you are compiling or running.Remember that SWT is a JNI library. You must also have the native Linuxshared libraries. These need to be made available to the Java native loader. Thefiles you need are located in the eclipse/plugins/org.eclipse.swt.gtk_2.1.2/os/linux/x86 directory. The .so files there must be available toany running SWT application. There are a couple of ways to do this. First, asdescribed in Section 5.7, you can set the LD_LIBRARY_PATH environmentvariable. You also can use the -D parameter for the runtime VM to set thejava.library.path property.If you want to, you can copy these files out of the eclipse directory tosome other location and then erase the eclipse directory with the lovable oldstandby, rm -rf eclipse.Oh, by the way, once you have compiled the sample code above and setyour classpath and Java library path correctly, running the application producesthe window shown in Figure 17.1.17.2.6.2 Anatomy of an SWT <strong>Application</strong>Before we launch into this discussion, we should point out that the Javadocdocumentation for all SWT packages is available as part of the Eclipse Platform
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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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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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