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Frequently Asked Questions

How can I use the JDK help system?

JCreator — Java IDE
After the installation start JCreator, open the Options dialog box from the Configure menu. Choose the tree item 'JDK Profiles' and click on the Edit button. The Profile Settings dialog will now popup. Select the documentation tab and add the root folder (C:\j2sdk1.4.2\doc) of the java documentation directory to the list. Close the dialogs. The error message means that java.exe cannot find the class file. Make sure your project is compiled without any errors.
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Which JDK should I use?

Frequently Asked Questions
We recommend Sun's SDK for Java 1.4 or 1.3. Xindice will not work with the SDK 1.2 or earlier. When using 1.3, be aware that there are known issues with Sun's SDK for Java 1.3.1 on several Linux distributions, but 1.3.0 or 1.4.2 should work without any problems.
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How do I configure a project to use a specific version of a JDK?

FAQs-1 - Maven User - Codehaus
lt;plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <verbose>true</verbose> <fork>true</fork> <executable><!-- path-to-javac --></executable> <compilerVersion>1.3</compilerVersion> </configuration> </plugin>
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Why are you forcing me to use a 1.5 JDK?

curn FAQ
For some time, I stuck with the 1.3 JDK, refusing to use even 1.4-specific features. But I finally standardized on Java 1.4, and then on 1.5, for the following reasons: There are various features in 1.5 (generics, the for each construct, enums, etc.), that I want to be able to use or experiment with. The regular expression classes that come with 1.
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Can I use other compilers with JDK?

Modelworks Software
Yes, use the script "replace JDK compiler" in Tools/Configuration and select your other compiler. You may also need to change your options for the compiler in the JDK/Edit Options... dialog. To enter options for your other compiler, just type them in next to the compiler.
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Which version of the JDK should I use?

FAQ on Westhawk's SNMP stack
The stack is compiled with JDK 1.4.1. The packages uk.co.westhawk.nothread.oscar and uk.co.westhawk.nothread.trap have to be compliant with JDK 1.2.X, since that is what Oracle™ 9i supports. However, this can be done by setting the javac target option to 1.2.
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Which JDK is required to use XStream?

XStream - Frequently Asked Questions
XStream has two modes of operation: Pure Java and Enhanced. In pure Java mode, XStream behaves in the same way across different JVMs, however it's features are limited to what reflection allows, meaning it cannot serialize certain classes or fields. In enhanced mode, XStream does not have these limitations, however this mode of operation is not available to all JVMs.
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Can I use Derby on JDK 5.0?

Frequently Asked Questions
Two problems with handling Decimal conversion on JDK 5.0 (DERBY-74 and DERBY-83) were fixed in Derby 10.1. JDK 5.0 is also known as JDK 1.5.
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What JDK should I use to develop Waba programs?

wabasoft - frequently asked questions
Any one of them should work fine. We've tested development of Waba programs using Sun's JDK 1.02, JDK 1.1 and JDK 1.2 and Microsoft's SDK for Java. There is code in the Waba bridge classes to ensure you can develop under any of the various versions.
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Can I use the JCOP Tools with JDK 1.4.x ?

Frequently Asked Questions
The IDE does currently not work with JDK 1.4.x versions, it instead expects 1.3.x JDKs. The individual tools like Shell, BugZ and converter may also work with JDK 1.4.x, but this has not intensively be tested.
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Can JDK help me plan my function or do they just provide the food?

Harrisburg Picnic Catering FAQs- JDK Catering, Central PA
JDK event planners can help with all the details from tent rentals to hiring the entertainment. The advantage of choosing JDK is that our designers have catered thousands of events and can use this experience to make your event just right! Prices quoted are based on food cost per person only. Please contact a JDK sales representative to receive a quote on professional labor and service charges.
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top] What version of the JDK does this require?

Jackcess - Frequently Asked Questions
Version 1.0 requires JDK 1.4 or higher. The version in CVS HEAD and future releases will require JDK 1.5 or higher. However, some users have contributed patches to make later versions compatible with JDK 1.4. Please check the contributions/ directory for any such patches. Note that any code in this directory is untested and unsupported, so please use at your own risk and do not file bugs based on that code.
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I am using Linux Fedora 1 and Sun JDK 1.5.0. Can I use 1.5 or do I need to use 1.4?

FAQs - Cocoon Wiki
To answer my own question... I uninstalled 1.5 and installed 1.4. Compiled and works fine. I suspect this is actually a problem with Ant. Is it possible to extend for example the form object in Flow? So that we have our own implementation of it? If so, are there examples. ps why was Flow written in javascript, and not java? Probably a stupid one:). Do you serialize it to JPG or PNG? Otherwise this error can not occur. But if, it's of course no longer SVG.
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What is the earliest JDK required to use ASM?

ASM - ASM FAQ
The org.objectweb.asm package should work with JDK 1.1, or even with JDK 1.0 if Type is not used. Indeed, this package only requires the following JDK classes and methods: ClassLoader.getSystemClassLoader, ClassLoader.getSystemResourceAsStream (only in one constructor of ClassReader) The asm.util and asm.tree packages require JDK 1.2, since they use the List interface and the ArrayList class. Tools and frameworks that are using ASM for bytecode processing (e.g.
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How do I use two different versions of jdk in ant script?

FAQ on ANT Building Process by Roseanne Zhang, Java Programm...
Don't define java.home by yourself. Ant uses an internal one derived from your environment var JAVA_HOME. It is immutable.
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How do I compile generics for use with JDK <= 1.4?

Java Generics FAQs - Under The Hood Of The Compiler
Retroweaver is a Java bytecode weaver that enables you to take advantage of the new 1.5 language features in your source code, while still retaining compability with 1.4 virtual machines. Retroweaver rewrites class files so that they are compatible with older virtual machines. Check out http://sourceforge.net/projects/retroweaver .
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How do I use Toolbox JDBC in a Netscape applet (without a JDK 1.2 or 1.3 plugin)?

IBM System i - IBM Toolbox for Java: FAQ
Include the JDBC 2.0 classes in the applet's classpath. Why? Because Netscape's class verifier is overly strict and tries to verify the existence of all referenced classes, even ones that the user's application never uses. It is enough that they are in the Toolbox jar file. Since the Toolbox supports JDBC 2.0, and the 2.0 classes are referenced in the Toolbox, but are not available in the applet's 1.1.x JVM, then the verifier throws an error. We ship stubs for the JDBC 2.0 classes in jtStubs.
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How can I use JDK 1.4.X with JStamp/SaJe/JStik?

JStamp(tm)
JemBuilder currently (aJile tools 3.15 and 3.16) can only process .class files that have a major version of 45 which Sun compilers from 1.0 through 1.3 generate by default. Sun's 1.4 (and later) compiler generates .class files with a major version number of 46 by default but the compiler's "-target" command line switch can be used to force it to generate class files that adhere to previous compiler versions if desired. We recommend you use JDK 1.4.1 or later and use the '-target 1.
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Do I need JDK 1.2/1.3 to use the Web-FixIT package?

Web-FixIT / e-FixIT FAQ
No. The xfijawt40.jar and xfijcore40.jar packages were built using JDK 1.1.8 from Sun and does not use JDK 1.2/1.3 spesific functionality. It works with JDK 1.2/1.3, though. As of Web-FixIT 4.0, xfijswing.jar contains Swing versions of the client components it is are compiled with JDK 1.3.
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Can I use Java Studio Enterprise 8.1 with JDK 1.6?

Sun Java Studio Enterprise IDE - Technical FAQs
Yes, but the Web Service functionality in 8.1 doesn't work correctly when IDE runs on Java SE 6. Due to changes in JAX-RPC here are some known problems in using JAX-RPC client. A bug has been filed for this problem. The Java Studio Enterprise IDE is based on NetBeans, so there should be no conflict there. If the Application Server is already installed on your machine, it will be detected by the Java Studio Enterprise installer.
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Why should I use log4j when JDK 1.4 already ships with a logging API?

Log4j project - Frequently Asked Questions about log4j
Although both APIs are conceptually similar, the log4j API is significantly more flexible and offers many more features, too numerous to be listed here. You will discover that the additional features and flexibility turn out to be indispensable in the context of a mission-critical application. The open and collaborative way in which log4j is developped ensures that it continues to preserve and even widen its competitive edge.
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Why doesn't JAMWiki use features from the latest JDK?

FAQ - JAMWiki
One of JAMWiki's goals is to be able to run on older application servers, and as a result all JAMWiki code is JDK 1.4 and Servlet 2.3 compatible. Many businesses and institutions upgrade their application servers only when they have to, and as a result there is a large base of servers that will not support newer JDKs.
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Can I use Java Development Kit (JDK) version 1.1.7x?

Adobe Acrobat Reader - Acrobat Viewer FAQ
The recommended JDK is version 1.1.8. However, on Windows, version 1.1.7 should work fine. On Solaris using 1.1.7, dialog boxes come up larger than full screen, along with several other annoying user-interface quirks.
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Why can't I use Lucene with IBM JDK 1.3.1?

jGuru: Lucene FAQ Home Page
Apparently there is a bug in IBM's JIT code in JDK 1.3.1. To work around it, disable JIT for the org.apache.lucene.store.OutputStream.writeInt method... When merging lots of indexes (more than the mergeFactor), the Directory-based method will use fewer file handles and less memory, as it will only ever...
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edit] Q: Are There Any Options I Can Use with the Java JDK?

FAQ-Configuration - OpenNMS
Note: this FAQ entry is out of date. I do not believe that any of these options work today. Dgregor 19:38, 15 February 2006 (CST) OK this is kind of minor... but this patch to the opennms start script (as it exists pre-build) adds the following env variables to configure garbage collecting... USE_CONCGC Use Concurrent Mark Sweep GC USE_PARALLELGC Use Parallel GC (multi-processor only, untested by me) LOG_GC Log GC to @root.install.logs@/gc.
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Can I use Help Me Out Here to take the Kneepads of Allure and then make someone help me?

Munchkin Errata
As long as the person you force to help you can make the difference between winning and losing (per Help Me Out Here's requirements), you most definitely can. Don't expect anyone to like you afterwords. . .
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Can the use of data help me?

Tennessee Department of Health: Tennessee Cancer Registry
Certainly. The analysis of quality, complete, and timely data can identify trends in disease that are used to inform screening activities and other cancer control efforts. The data is also used by Health Department staff and cancer researchers to identify at-risk groups for targeted interventions, to investigate potential clusters of cancer, and to identify geographic regions adversely affected by cancer.
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