VB and java
guys can you help i want call java class using visual basic
Stinkin' crossposter...
http://forum.java.sun.com/thread.jspa?threadID=609305
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Whats is difference between Java JRE and Java SDK
Hi,
what is the difference between Java JRE and Java SDK...
i think both of them have the same set of files to be installed...
I am not able to understand where they differThe JRE (Java runtime Environment) contains just the stuff necessary to run Java and the SDK (System Development Kit) contains the extra stuff necessary (and also helpful) to develop in Java.
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What is difference between C# Gzip and Java swing GZIPOutputStream?
Hi All,
I have a Java swing tool where i can compress file inputs and we have C# tool.
I am using GZIPOutputStream to compress the stream .
I found the difference between C# and Java Gzip compression while a compressing a file (temp.gif ) -
After Compression of temp.gif file in C# - compressed file size increased
while in java i found a 2% percentage of compression of data.
Could you please tell me , can i achieve same output in Java as compared to C# using GZIPOutputStream ?
Thank a lot in advance.797957 wrote:
Does java provides a better compression than C#?no idea, i don't do c# programming. and, your question is most likely really: "does java default to a higher compression level than c#".
Btw what is faster compression vs. better compression?meaning, does the code spend more time/effort trying to compress the data (slower but better compression) or less time/effort trying to compress the data (faster but worse compression). most compression algorithms allow you to control this tradeoff depending on whether you care more about cpu time or disk/memory space. -
What is the diffrence between package javax.sql and java.sql
Is javax designed for J2EE?
And when to use package javax?Hi,
What is the diffrence between package javax.sql and java.sql?The JDBC 2.0 & above API is comprised of two packages:
1.The java.sql package and
2.The javax.sql package.
java.sql provides features mostly related to client
side database functionalities where as the javax.sql
package, which adds server-side capabilities.
You automatically get both packages when you download the JavaTM 2 Platform, Standard Edition, Version 1.4 (J2SETM) or the JavaTM 2, Platform Enterprise Edition, Version 1.3 (J2EETM).
For further information on this please visit our website at http://java.sun.com/j2se/1.3/docs/guide/jdbc/index.html
Hope this helps.
Good Luck.
Gayam.Srinivasa Reddy
Developer Technical Support
Sun Micro Systems
http://www.sun.com/developers/support/ -
What is the diffrence between My Runnable Interface and Java Runnable
Hi folks
all we know that interfaces in java just a decleration for methods and variables.
so my Question is why when i create an interface its name is "Runnable" and i declared a method called "run" inside it.then when i implements this interface with any class don't do the thread operation but when i implement the java.lang.Runnable the thread is going fine.
so what is the diffrence between My Runnable Interface and Java Runnable?
thnxHi folks
all we know that interfaces in java just a decleration
for methods and variables.
so my Question is why when i create an interface its
name is "Runnable" and i declared a method called
"run" inside it.then when i implements this interface
with any class don't do the thread operation but when
i implement the java.lang.Runnable the thread is going
fine.
so what is the diffrence between My Runnable Interface
and Java Runnable?
thnxClasses and interfaces are not identified by just their "name", like Runnable. The actual "name" the compiler uses is java.lang.Runnable. So even if you duplicate the Runnable interface in your own package, it's not the same as far as the compiler is concerned, because it's in a different package.
Try importing both java.util.* and java.awt.* (which both have a class or interface named List), and then try to compile List myList = new ArrayList(); -
I am a IT graduate and I still need some clarification on the relationship between Java SE and Java EE API. Does EE include SE?
For application development, I know I can use only SE without the EE, but can I use EE alone without SE?
Any good articles addressing my questions?
Thank you very much
RJava EE in fact extends java SE, its primarily aim is to simplify developing multitier enterprise applications (Java SE provides all the necessary basic libraries etc.)
Because Java EE is an extension of Java SE, you cant use EE without SE - without SE there is no EE. -
SSO between Portal and Java WD application
Hi Experts,
I am using CE 7.2 on localhost and I am very new to SAP.
I need to know how can I get SSO between Portal and Java WD. I have a WD application that displays the logged in user using "IUser currentUser = WDClientUser.getCurrentUser().getSAPUser()", as well I can use "IUser user = UMFactory.getAuthenticator().getLoggedInUser()". Both work.
Q1. What is the difference in the 2 above?
Q2. My WD application is set to authenticate user. The WD application is in URL iView. I need SSO between Portal and WD application. Is there a way to get this SSO without SAP Backend (ECC), for now I just need SSO between Portal and Java WD appl.
Everything is in localhost.
Please advice. Thanks.> need to know how can I get SSO between Portal and Java WD.
Then I suggest you ask your question in the Web Dynpro Java forum instead of the Web Dynpro ABAP one. -
J2me and java card, need help to communicate
we are trying to put together a reader to read smartcards using j2me and we figure that it would be easiest if we could develop it to work with java cards rather than standard smart cards, the problem is we get garbage when we communicate to it, the chip sends us crap, any suggestions what might be wrong, any calls we might be missing, has anyone worked with j2me and java cards or smart cards, any help would be appreciated.
einar.... reader app and the ME behind it .... smells like mobile ....
First of all - if you want to have one mobile application running on this just make sure that whatever is written in ME can use drivers from the reader chip ....
Workin on the PC is something completely different. There was one good example how to develop one host application in Java provided with the JCOP tools long ago ... I don't know if this is now in the new Eclipse tools.
But - there was a small API provided that can give you good hints what to do - and - once you have it on the reader side - you can easily integrate ME methods with this ... -
Eclipse 3.4 and Java 6 compatibility
Hi All,
I have a tomcat plugin inside Eclipse 3.4.2. Recently I upgraded from Java 5 to Java 6. When I try to start Tomcat from Eclipse,I get the following error:
Error occurred during initialization of VM
java.lang.UnsatisfiedLinkError: java.lang.Float.floatToIntBits(F)I
at java.lang.Float.floatToIntBits(Native Method)
at java.lang.Math.<clinit>(Math.java:801)
at sun.net.www.ParseUtil.lowMask(ParseUtil.java:512)
at sun.net.www.ParseUtil.<clinit>(ParseUtil.java:559)
at sun.misc.Launcher.getFileURL(Launcher.java:388)
at sun.misc.Launcher$ExtClassLoader.getExtURLs(Launcher.java:165)
at sun.misc.Launcher$ExtClassLoader.<init>(Launcher.java:137)
at sun.misc.Launcher$ExtClassLoader$1.run(Launcher.java:121)
at java.security.AccessController.doPrivileged(Native Method)
at sun.misc.Launcher$ExtClassLoader.getExtClassLoader(Launcher.java:118)
at sun.misc.Launcher.<init>(Launcher.java:51)
at sun.misc.Launcher.<clinit>(Launcher.java:39)
at java.lang.ClassLoader.initSystemClassLoader(ClassLoader.java:1304)
at java.lang.ClassLoader.getSystemClassLoader(ClassLoader.java:1286)
Kindly suggest what needs to be done? If I am posting it in a wrong forum please suggest me the right one too.
I would like to know if Eclipse 3.4 and Java 6 are compatible or not.
Thanks in advance.ShubhaPradeep wrote:
I have a tomcat plugin inside Eclipse 3.4.2. Recently I upgraded from Java 5 to Java 6. When I try to start Tomcat from Eclipse,I get
Error occurred during initialization of VM
java.lang.UnsatisfiedLinkError: java.lang.Float.floatToIntBits(F)IAre we talking 64-bit Linux?
I had issues launching eclipse on CentOS 5 64-bit and Sun JDK 1.6,
resolved by launching eclipse with the -vm option specifying Sun JDK 1.5 java.
[https://www.centos.org/modules/newbb/viewtopic.php?post_id=95784&topic_id=11661] -
Problem with win2000sp3 and Java web start
I have JRE and Java web start (1.2.0_01, build b01) which come downloading file j2re-1_4_1_01-windows-i586-i.exe from sun.
I have win2000pro running on my PC.
I had updated win2000 to service pack 2 and everything was fine.
Now i decided to update to service pack 3 (in the process I also updated other components) from Microsoft and:
1) Java applets seem to be running fine within i.e.
2) If i try to run an application from java web start my PC freezes and I have to restart it.
3) Staroffice 6.0, which runs on Java, seems to be fine.
I reinstalled both sp3 and jre etc, with no result.
Is this a known problem?
Thanks to all.
MaurizioI suspect that you have hit a known problem with Swing on Java 1.4.1 with buggy video drivers. Do you have an ATI card? They are the worst offenders. ATI released new drivers for its Radeon line today. They fix the problem.
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Problem with JSP and Java Servlet Web Application....
Hi every body....
I av developed a web based application with java (jsp and Java Servlets)....
that was working fine on Lane and Local Host....
But when i upload on internet with unix package my servlets and Java Beans are not working .....
also not access database which i developed on My Sql....
M using cpanel support on web server
Plz gave me solution...
Thanx looking forward AdnanYou need to elaborate "not working" in developer's perspective instead of in user's perspective.
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Report Script returns no data and "java.io.FileNotFoundException" error
When attempting to write to a new file (Eg: C:\TEST.txt), Report Script returns no data and "java.io.FileNotFoundException" error occurs.
This error occurs only in Essbase 9.3.1.3 release, however it works fine in release 9.3.1.0.
After running the report the script, it pops up the follwing message:
"java.io.FileNotFoundException: ..\temp\eas17109.tmp (The system cannot find the file specified): C:\TEST.txt"
When checked the TEST.txt, it was empty.Sorry folks, I just found out the reason. Its because there was no data in the combination what I was extracting.
but is this the right error message for that? It should have atleast create a blank file right? -
I have used Firefox as my default browser for many years. I've recently started getting a Java error message. It pops up continually. I have updated flash and java. I have uninstalled and re-installed Firefox and nothing has helped. I have had to start using Chrome instead of Firefox which I don't care for but I don't have the java error with Chrome. How do I fix this problem? The error reads as follows:
Java Script Application
Error: syntax errorYour '''JavaScript''' error has nothing to do with the Java plugin . It is likely caused by an added extension (the earlier forum threads [/questions/944619] and [/questions/943088] mention disabling or updating the Social Fixer extension will resolve the problem).
You can read this article for help troubleshooting your extensions: [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] -
Java plugin doesn't work, even though it's installed correctly and java programs work.
As stated. I have a link in ~/.mozilla/plugin that points to test/jre/plugin/i386/ns7/libjavaplugin_oji.so, which is the java 6 update 21 runtime environment.
Java doesn't show in about:plugins, and java applets don't start (firefox suggests to install missing plugins).
Java programs using the jre outside the browser work.
This is on Linux 32-bits, Slackware 13.0, kernel 2.6.34.<blockquote>As stated. I have a link in ~/.mozilla/plugin that points to test/jre/plugin/i386/ns7/libjavaplugin_oji.so, which is the java 6 update 21 runtime environment.
</blockquote>
Where did you read that?<br />
See http://kb.mozillazine.org/Java<br />
In Firefox 3.6 and later versions you need the Next-Generation Java™ Plug-In present in Java 6 U10 and later (Linux: libnpjp2.so; Windows: npjp2.dll).
http://java.com/en/download/faq/firefox_newplugin.xml
http://java.sun.com/javase/6/webnotes/install/jre/manual-plugin-install-linux.html
<pre><nowiki>ln -s /usr/local/java/jre1.6.0_20/lib/i386/libnpjp2.so libnpjp2.so
ln -s /usr/lib/jvm/jre/lib/i386/libnpjp2.so /usr/lib/mozilla/plugins/libnpjp2.so (java-1_6_0-sun-plugin)
</nowiki></pre> -
I have updated to Firefox 23 and it disabled my Java and Flash plugins. I then updated these to Flash 11.8.800.94 and Java to Version 7 Update 25. Now these are showing up on the plug in page but are showing "disabled" with no option to enable. How do I enable them to view content on the web.
Thanks Philipp but i have already done that and the content started working...
However, when i closed and restarted the browser it returned back to the same settings...
I dont think that should happen, but anyway thank you for the solution. At least I can use it by resetting the values if need be
Appreciate your help -
How not to use Cold Fusion and Java
Overview
This write up is intended to give java developers that are
developing ColdFusion applications some beneficial information:
things that are not documented.
Scenario
The company builds enterprise class web application software
for fortune 500 companies. It had purchased a CF 7 based product,
had and existing proprietary J2EE based product, and needed to
integrate the two while meeting a host of new requirements. These
requirements were based on delivering a better user experience,
faster / cheaper integration, increased flexibility /
configuration, useablily, decreasing maintenance costs, the ability
to deploy in either install or ASP models. An initiative was
started to create a new framework that integrated the best of each
technologies. Tactically, this meant that we were to build a hybrid
CF and java application: one that used building blocks (decoupled /
cohesive components) that would allow applications to be rapidly
assembled, configured and deployed. This made sense on several
levels, the team was composed of Java and CF developers, the CF
rapid application development was very productive, there is great
functionality delivered in the CF platform and initial performance
tests showed no cause for alarm
The agreed upon design, based on requirements, and analysis
by both the CF and Java staff has us using CF in the presentation
layer, using a CF based MVC, use of CF based web services. The MVC
was deployed using CFC inheritance for model objects and views made
use of CF custom tags. The internals of the application, used a
rules engine, some proprietary java, ORM, and other J2EE
technology. The initial performance of the system was reasonable.
We pushed on with product implementation.
Then it was time to load test the application, and tune it.
Under load the response times were orders of magnitude slower,
sometimes the pages even timed out.
Armed with our profiler, oracle execution plans and we
charged ahead addressing issue after issue. Note that we took
meticulous care in tweaking the active thread pool and ensuring
that our CF setup was tuned for our application. None of the
observations here are a condemnation of the language; rather they
are aspects that, when considered together, not conducive for
building integrated java and CF frameworks that use a structured /
OO programming practices. Further detail can be provided on
request.
CFC inheritance should be avoided - resolution of variable
scope is expensive even if properly declared.
Since CF creates a class per method under the covers call
stacks become very large, especially if used in a loop. This is
nominally exacerbated by CF calls necessary to set up for the
method call (String.toUpper()).
Nesting of loops and if statements should be kept to a
minimum - the conditional for each lookup of logical operator like
LT, GT are synchronized. Under load this results in thread waits.
Jrun has as single thread pool - both http and web service
requests use the same pool. Under load this leads to thread
deadlock. There are work arounds, but they are painful.
Recursion should be avoided - we had a few recursive routines
and these had to be rewritten.
Custom Tags - should be used sparingly - each custom tag
makes a synchronized call to the license server - (This may be
fixed in CF 8)
Summary
In the end we got the performance to reasonable numbers, but
we ended up moving some code to java (Custom Tags) and getting rid
of 'good programming' practices (Inheritance, loops, etc), mandated
proper variable scoping for those things left over. We prototyped a
sans cold fusion implementation and had an order of magnitude
improvement in performance and number of requests served per
second.
The lesson? Use Coldfusion in its sweet spot: make a query,
iterate over the results and format for display. Extensive use of
structure programming techniques or OO CFCs should be avoided: they
will work but under load - but are better as a prototype. Building
frameworks in CF? Think twice, no three times, and, if you must, be
minimalist.
Textinteresting aslbert123,
Not that I doubt you, but could you answer some questions
about your implementation that was so slow:
1.) Did you put your CFCs in the application or server scope?
2.) Were you initializing your CFCs, via CreateObject or
<cfinvoke>, on every request?
3.) Are you sure that you were properly Var'ing every
variable in your methods? (people typically forget about query
names and loop iterator variables)
4.) Could you give examples of how your inheritence was set
up?
5.) For CustomTags, did you call them the old <cf_tag>
way or the newer, better-performing <cfimport> way?
6.) How did you connect CF to Java exactly?
Thanks,
Aaron
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