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Frequently Asked Questions

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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Can we use a JVM different from Sun's JVM 1.6, 1.5 or 1.4 ?

JBlitz FAQ
Error message 'unable to find valid certificate path' is received when using a https request with a self-signed or test certificate
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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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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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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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How do I extract pages using Adobe Acrobat 6.0.x and save them as PDF 1.4 (not 1.5)?

Help with Mac OSX
It's not that easily found, but pick Advanced> PDF Optimizer and choose Compatible with: Acrobat 5.0 and Later in the popup menu at the top of the page. The file will save as PDF 1.4. I didn't check whether links are preserved, but I would expect them to be. --marc" Workaround: It is very easy to extract pages if you have a TeX installation (see the TeX on Mac OS X page -- I recommend the version from Wierba's i-Installer together with the front-end TeXShop).
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top]Why should I use log4j when JDK 1.4 already ships with a logging API?

Apache log4j 1.2 - Frequently Asked Technical Questions
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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How can I install Java (JDK) on Linux?

FAQ - GEANT2-JRA1 Wiki
The easiest way is to use packet manager (eg. for debian apt-get). If you are unsure, follow steps on this page at "How can I install Java (JDK) on Debian?"
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Do I need Sun JDK/JRE to run Virtual Keyboard?

Virtual Keyboard - FAQ
No, Virtual Keyboard does not require any specific native keyboard layout and language settings. Instead, it has all the necessary keyboard layouts built-in and ready for use.
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How do I override the JAXP implementation in JDK 1.4 and above?

Unofficial JAXP FAQ
In JDK 1.4, there is an Endorsed Standards Override Mechanism which can be used to override the classes in the JDK itself. One way to replace the classes in the JDK with the classes contained in a set of jar files is to place the jar files in some directory, "my-endorsed", and define a system property. For example, to use a newer version of Xalan, place the newer version of xalan.jar in the "my-endorsed" directory and invoke the Java launcher with the -Djava.endorsed.dirs= my-endorsed option.
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Can I use J2EE 1.4 products to run this benchmark?

SPECjAppServer2004 Frequently Asked Questions
Yes. Any product conforming to the J2EE 1.3 or later specifications can be used to run this benchmark. CTS certification ensures that the application server being tested is a J2EE technology-based application server and not a benchmark-special application server that is crafted specifically for SPECjAppServer2004. The CTS certification is validated by Sun Microsystems, Inc.
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Which version of the platform should I use now -- 1.4 or 1.3?

Java 2 Platform, Enterprise Edition (J2EE) FAQ
The J2EE 1.4 specification is final and you can use the J2EE 1.4 SDK to deploy applications today. However, for improved reliability,scability, and performance, it is recommended that you deploy your applications on J2EE 1.4 commercial implementations that will be available early in 2004. If you want to deploy your application before 2004, and reliability,scability, and performance are critical, you should consider using a high performance application server that supports J2EE v1.
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Do I need to use sun protection when using Alpha Hydroxy Acids (AHA)?

Anti ageing skin care solutions - Alpha-H - Acne skin care s...
It is absolutely necessary to use a 30+ SPF sun protection at any time regardless of whether you are using AHA's as it is now proven that exposure to UVA/B rays is the major cause of premature ageing. It is imperative to use sun protection when using AHA's, as many skin concerns we treat with Alpha-H are directly related to sun exposure ie; premature ageing, sun damage, pigmentation and age spots.
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I am using Fedora Core 3. Which version of libstdc++ do I need?

MPP FAQ by RAE Internet
FC3 comes with gcc-3.4 which includes libstdc++.so.6 and it is the default gcc. You will need to install the "compat-libstdc++" package as mppd depends on libstdc++.so.5. Back To Top
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How is the SCJP 1.5 exam different from the SCJP 1.4?

JavaRanch FAQ : Scjp Faq
Exam objectives: Several important new language features have been added, including enums, generics, static imports, and autoboxing/unboxing. API features added to the exam include java.lang.StringBuilder, java.util.Locale, java.util.Formater, java.util.Scanner. java.util.regex.Pattern, and java.util.regex.Matcher. Java IO features have been added, including File, BufferedReader, BufferedWriter, FileReader, FileWriter and PrintWriter.
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How can I make a DVD using linux?

Internet Archive Frequently Asked Questions
Archive user sent in the following instructions for creating DVDs on a linux system: To do this under linux from the command line: This requires a few common programs. Using any modern package distribution of linux installing these should be quite simple. Done! You should now have a folder called "DVD_folder" with your movie. You can create an ISO or BIN image with mkisofs:
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What is Signal Chaining mechanism that has been implemented in JDK 1.4?

www.adobians.com
Signal-chaining enables the Java Platform to better interoperate with native code that installs its own signal handlers. The facility works on both Solaris and Linux platforms. The signal-chaining facility was introduced to remedy a problem with signal handling in previous versions of the Java Hotspot VM. Prior to version 1.
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Why do Swing GUI applications (including JDebugTool) hang in JDK 1.4?

JDebugTool - Graphical Java Debugger
Java Swing GUI applications (including JDebugTool) can hang in JDK 1.4. The work around is to add the following argument to java -Dsun.java2d.noddraw=true
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Scriptura XBOS requires JDK 1.4. I am running OS/400 V5R1. How do I get it?

Inventive Designers : Scriptura FAQ
The following document describes what you need to do to get JDK 1.4 (also known as Java 2 version 1.4) operational on your iSeries running OS/400 V5R1 : http://www-912.ibm.com/s_dir/slkbase.NSF/1ac66549a21402188625680b0002037e/0581029cdbcafcbd86256c4f00673b7d?OpenDocument
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Is there a sample that illustrates Non-Blocking Socket I/O in JDK 1.4?

jGuru: JNI FAQ Home Page
A sample server that illustrates Non-Blocking Socket I/O can be found at http://www.owlmountain.com/tutorials/NonBlockingIo.htm.
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Do I still need to use sun block even in the winter?

Skin Care Products - neaclear Liquid Oxygen Skin Care Produc...
this is a very popular question. yes, wearing sun block daily is one of the best anti-aging remedies ever studied. sun block helps to protect your skin from the damage that is attacking it daily. sun blocks are also now being proven to help reverse signs of aging.
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Do I need to use sun protection?

THIENNA Skin Whitening Pill, Skin Whitening, Skin Bleaching ...
Yes. UV Radiation will trigger your body to produce black melanin pigment and may deplete or dilute FAIRSKIN? nutrients. Research shows that 45 minutes in the sun will take 7 long months to correct the skin. Stay out of the sun when possible. FAIRSKIN Sunblock will arrive online by 2007. Use FAIRSKIN? After-Sun Soak product for extreme UV expose after you have been out on a sunny day!
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Can I look at the sun directly by holding the prefilter in-front of the 1.5 Angstrom filter?

Frequently Asked Questions
No! The two filters, in combination, require a substantial image magnification in order to reduce the light intensity to a safe level. Yes. The customer specifies his telescope type when ordering, and Lumicon then selects the appropriate Energy Rejection Prefilter.
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What is JDK 1.5? Is it same as J2SE 5.0/1.5? Also I heard about Tiger. What is Tiger?

Java Language FAQs
Tiger is the code name of Java 5.0 during its development. Then Sun gave the name J2SE (Java2 Standard Edition) 1.5. But compared with J2SE 1.4, J2SE 1.5 has some very important changes to Java language. So Sun preferred to call it as J2SE 5.0 to signify major changes to language. The new name gave by Sun is Java SE 5.0 (they are dropping 2 from name as it refers to Java2 and now Java2 is not appopriate any more).
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Where can I find information about the sun.* classes in the JDK?

Java Programmer's FAQ
You're not supposed to. Those classes are only to support functions in the java.* hierarchy. They are not part of the API, and won't be present in Java systems from non-Sun vendors. Some people have reverse engineered the code and published an API for these classes but you use it at your own risk, and it may change without warning. Worst of all, those programs will not have the portability of true Java but will only run on Sun JDKs. For the same reason you shouldn't use classes outside the java.
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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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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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What if I need my certificate from a Sun course?

FAQ
In order for you to request another Sun course certificate or check on the status of your certificate, please contact your local Sun office.
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Q 1.4: Can I use Ethereal as part of my commercial product?

Ethereal: Frequently Asked Questions
As noted, Ethereal is licensed under the GNU General Public License. The GPL imposes conditions on your use of GPL'ed code in your own products; you cannot, for example, make a "derived work" from Ethereal, by making modifications to it, and then sell the resulting derived work and not allow recipients to give away the resulting work.
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