Lots of Java's on my computer

I was just looking at the add/remove programs window in Control panel and I noticed I have about 4 or 5 different java things. I was just wondering which ones I need...
Java 2 Runtime Envoironment, SE 1.4.1_02 size: 1.72 MB
Java 2 Runtime Envoironment, SE 1.4.2 size: 66.16 MB
Java 2 SDK, SE 1.4.2_03 size: 205.00 MB
Java Web Start size: 2.05 MB
I figure it would be best just to get rid of the first one and keep the rest. Though I am not sure about the last, as it is pretty small and I don't know what it is for.
Any advice?

If you're not a developer get rid of the "SDK", just keep the highest version of the Java Runtime Environment (1.4.2) and remove the rest including Java Web Start (this is now included in the latest Runtime Environment).

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For a while now my computer has been saying " Start up disk is nearly full", however I don't have a lot of stuff saved on the computer I moved a lot to a flash drive, and all the other stuff are songs and recently saved essays for school. I have and frequently empty my trash can. I have researched this before and i see a lot of things that say get a external hard drive, but before I go and purchase one I want to make sure there is no other, simpler way, to solve this problem. Help Please.

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Installing Java on an NT4 computer without an Administrator account

The problem is: I've got a normal PC where Java works perfectly (because I'm an administrator there). Well, that's not the problem really, but the thing is that I need to run a Java application on a computer where I don't have Administrator rights (NT4 with Service Pack 5a) and what is still worse, I can only write into C:\ and C:\Temp. I've got an H:\ network drive to store all my files.
Java 1.4.0 cannot be installed (InstallShield tells that writing into C:\Program Files\Common Files\ isn't allowed).
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Is there an option to tell Java the path to its resources in the command-line or putting the registry key into another location where an ordinary user can create it?

I've tried running the same not-installed JRE on the same machine and it worked! I don't even know what happened. Amazing!

Problem in moving the java beans code from computer to other

Hi,
I am working on building a webservice. I started building the EJB teir compnents like (Entity beans, Sessions beans, data base schemas) using the SUN ONE STUDIO 5 and SUN ONE App Server 7.0.
The problem, if I want to move the same entity beans code from one computer to other computer.
I am using same platform except the operating system (XP, and Windows 2000), apart from this every thing is same (Sun one studio 5, sun one app server 7.0). The Entity beans are working on the source computer and tested the beans. But When I moved the code to other computer, I compiled the entity beans code and it compiled perfectly. Then I tested the entity bean, I generated the test client, and deployed it. Till now no problem. When I tried to excute it and invoke the functions then it giving the following error:
Is there any solution, so that I can avoid coding from scrath again when I want to use same on other computer.
[22/Sep/2003:10:29:39] SEVERE ( 1616):
javax.ejb.EJBException: nested exception is: com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerImpl.getObjectById(PersistenceManagerImpl.java:615)
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerWrapper.getObjectById(PersistenceManagerWrapper.java:247)
at Data.AppNumInfoBean_535499553_ConcreteImpl.jdoGetInstance(AppNumInfoBean_535499553_ConcreteImpl.java:905)
at Data.AppNumInfoBean_535499553_ConcreteImpl.ejbLoad(AppNumInfoBean_535499553_ConcreteImpl.java:693)
at com.sun.ejb.containers.EntityContainer.callEJBLoad(EntityContainer.java:2372)
at com.sun.ejb.containers.EntityContainer.afterBegin(EntityContainer.java:1362)
at com.sun.ejb.containers.BaseContainer.startNewTx(BaseContainer.java:1405)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:1313)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:462)
at Data.AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.getDatelastapp(AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.java:113)
at Data._AppNumInfo_Stub.getDatelastapp(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.forte4j.j2ee.ejbtest.webtest.InvocableMethod$MethodIM.invoke(InvocableMethod.java:231)
at com.sun.forte4j.j2ee.ejbtest.webtest.EjbInvoker.getInvocationResults(EjbInvoker.java:96)
at com.sun.forte4j.j2ee.ejbtest.webtest.DispatchHelper.getForward(DispatchHelper.java:189)
at jasper.dispatch_jsp._jspService(_dispatch_jsp.java:136)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
javax.ejb.EJBException: nested exception is: com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
at com.sun.ejb.containers.EntityContainer.afterBegin(EntityContainer.java:1378)
at com.sun.ejb.containers.BaseContainer.startNewTx(BaseContainer.java:1405)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:1313)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:462)
at Data.AppNumInfoBean_53
[22/Sep/2003:10:32:00] INFO ( 1616): Bean AppNumInfo method ejbLoad:
com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerImpl.getObjectById(PersistenceManagerImpl.java:615)
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerWrapper.getObjectById(PersistenceManagerWrapper.java:247)
at Data.AppNumInfoBean_535499553_ConcreteImpl.jdoGetInstance(AppNumInfoBean_535499553_ConcreteImpl.java:905)
at Data.AppNumInfoBean_535499553_ConcreteImpl.ejbLoad(AppNumInfoBean_535499553_ConcreteImpl.java:693)
at com.sun.ejb.containers.EntityContainer.callEJBLoad(EntityContainer.java:2372)
at com.sun.ejb.containers.EntityContainer.afterBegin(EntityContainer.java:1362)
at com.sun.ejb.containers.BaseContainer.startNewTx(BaseContainer.java:1405)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:1313)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:462)
at Data.AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.setDatelastapp(AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.java:138)
at Data._AppNumInfo_Stub.setDatelastapp(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.forte4j.j2ee.ejbtest.webtest.InvocableMethod$MethodIM.invoke(InvocableMethod.java:231)
at com.sun.forte4j.j2ee.ejbtest.webtest.EjbInvoker.getInvocationResults(EjbInvoker.java:96)
at com.sun.forte4j.j2ee.ejbtest.webtest.DispatchHelper.getForward(DispatchHelper.java:189)
at jasper.dispatch_jsp._jspService(_dispatch_jsp.java:136)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
[22/Sep/2003:10:32:00] SEVERE ( 1616): EJB5017: Exception while running preinvoke : ejbName = [AppNumInfo]
[22/Sep/2003:10:32:00] SEVERE ( 1616):
javax.ejb.EJBException: nested exception is: com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerImpl.getObjectById(PersistenceManagerImpl.java:615)
at com.sun.jdo.spi.persistence.support.sqlstore.impl.PersistenceManagerWrapper.getObjectById(PersistenceManagerWrapper.java:247)
at Data.AppNumInfoBean_535499553_ConcreteImpl.jdoGetInstance(AppNumInfoBean_535499553_ConcreteImpl.java:905)
at Data.AppNumInfoBean_535499553_ConcreteImpl.ejbLoad(AppNumInfoBean_535499553_ConcreteImpl.java:693)
at com.sun.ejb.containers.EntityContainer.callEJBLoad(EntityContainer.java:2372)
at com.sun.ejb.containers.EntityContainer.afterBegin(EntityContainer.java:1362)
at com.sun.ejb.containers.BaseContainer.startNewTx(BaseContainer.java:1405)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:1313)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:462)
at Data.AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.setDatelastapp(AppNumInfoBean_535499553_ConcreteImpl_EJBObjectImpl.java:138)
at Data._AppNumInfo_Stub.setDatelastapp(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.forte4j.j2ee.ejbtest.webtest.InvocableMethod$MethodIM.invoke(InvocableMethod.java:231)
at com.sun.forte4j.j2ee.ejbtest.webtest.EjbInvoker.getInvocationResults(EjbInvoker.java:96)
at com.sun.forte4j.j2ee.ejbtest.webtest.DispatchHelper.getForward(DispatchHelper.java:189)
at jasper.dispatch_jsp._jspService(_dispatch_jsp.java:136)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.iplanet.ias.web.jsp.JspServlet$JspServletWrapper.service(JspServlet.java:552)
at com.iplanet.ias.web.jsp.JspServlet.serviceJspFile(JspServlet.java:368)
at com.iplanet.ias.web.jsp.JspServlet.service(JspServlet.java:287)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:720)
at org.apache.catalina.core.StandardWrapperValve.access$000(StandardWrapperValve.java:118)
at org.apache.catalina.core.StandardWrapperValve$1.run(StandardWrapperValve.java:278)
at java.security.AccessController.doPrivileged(Native Method)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:274)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:203)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:505)
at com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:157)
at com.iplanet.ias.web.WebContainer.service(WebContainer.java:598)
javax.ejb.EJBException: nested exception is: com.sun.jdo.api.persistence.support.JDOUserException: Object not found for this ObjectId.
NestedException: java.lang.ClassCastException: java.lang.String
at com.sun.ejb.containers.EntityContainer.afterBegin(EntityContainer.java:1378)
at com.sun.ejb.containers.BaseContainer.startNewTx(BaseContainer.java:1405)
at com.sun.ejb.containers.BaseContainer.preInvokeTx(BaseContainer.java:1313)
at com.sun.ejb.containers.BaseContainer.preInvoke(BaseContainer.java:462)
at Data.AppNumInfoBean_53

There appears to be either a portion that didn't get recompiled, or perhaps a hard-coded GUID-type number within the application. Carefully go over the elements in the application that were hard-coded to run on the other machine -- were they have all been migrated?

Is Java application slow down computer??

Hi all,
I was a newbie in java programming. I wanna make application with java, but some of my friend told me that java application can make u're system run slow cause u have to import all the classes that u need for u're application.
I wanna ask is java programming is slow down system when I compile and run the application that made u're application that I've made respond slowly?? How to avoid this??
Thanks for u're help.
My regrards

Hi all,
I was a newbie in java programming. I wanna make
application with java, but some of my friend told me
that java application can make u're system run slow
cause u have to import all the classes that u need
for u're application.
I wanna ask is java programming is slow down system
when I compile and run the application that made u're
application that I've made respond slowly?? How to
avoid this??when you do something on your computer resources will be used. if you don't want to use computer resources turn the computer off.
if you don't want to program in java dont, noone is forcing you. when java runs it will load up a vm and a library for it. that's the way it is. it may take a little longer then the equiv native app, but that's because the native app's vm and so on is ALREADY loaded (it's the OS).
in summary: deal with it. it's not that bad. there are some very good examples of java desktop apps that work well; azereus being one, i'm sure there are others.

I can run java programs on my computer

I just bought a new computer and I was trying to run a java program on it but it didn't work, I can compile, but not run. this is what happens when I try to run it.
Usage: java [-options] class [args...]
           (to execute a class)
   or java -jar [-options] jarfile [args...]
           (to execute a jar file)
where options include:
    -client   to select the "client" VM
    -server   to select the "server" VM
    -hotspot      is a synonym for the "client" VM [deprecated]
                  The default VM is client.
    -cp -classpath <directories and zip/jar files separated by ;>
                  set search path for application classes and resources
    -D<name>=<value>
                  set a system property
    -verbose[:class|gc|jni]
                  enable verbose output
    -version      print product version and exit
    -showversion print product version and continue
    -? -help      print this help message
    -X            print help on non-standard options
    -ea[:<packagename>...|:<classname>]
    -enableassertions[:<packagename>...|:<classname>]
                  enable assertions
    -da[:<packagename>...|:<classname>]
    -disableassertions[:<packagename>...|:<classname>]
                  disable assertions
    -esa | -enablesystemassertions
                  enable system assertions
    -dsa | -disablesystemassertions
                  disable system assertionsthis is the java I installed on my computer: j2sdk1_4_0-win

if you mean terminal by the command prompt, then yes, I have tried it, and I got the same results. Is it possible that the java edition I have is out of date?
Message was edited by:
jpeanut

Java projects in Agent Computing.

One of my friend requires to do his intern project(for his masters degree) in Agent computing(preferably enterprise related). Can any one suggest me a problem which is solvable using Java in Agent conputing area. I will appreciate for the help.
Thanks,
Raghu

I saw few problems which is already solved. I want some problem which is not done by any one.

Too Many Panics - Lots of Java Errors - Re-installed Safari

My stable-since-I-bought-her-new-in-2007 1.83GHz Intel Core Duo 2GB Apple RAM started to panic crash all the time on me recently. But only during/after running Safari. Repairing Disk Permissions showed a lot of "javascript" errors ...
I un-installed Safari. And re-installed from the copy at the Apple Support site. Tremendous improvement in overall performance.
I am not sure what caused my problem. I was only using one authorized plug-in. And I have had no similar problems on my 17" MacBook Pro from late 2006.
But I am back to feeling productive again with my mini!
THANKS to those who took the time to read my Panic reports last week.
Clint Bradford

Hi Clemens,
- Do you have any idea why "TOP" utility shows me RAM is being consumed almost 99%. I have gone through the different processes that are running in the server, but didnt find any of them which are not consuming even all together a total of 100-150MB of RAM.
- We have only tomcat server running in it, no other applicatoin not even DB server.
- I have installed the same application in our testing server which is setup in the same lines. There I find only single thread of JAVA and consuming around the same memory and the TOP utility shows us OUR SERVER RAM still having 50% of memory free. The only difference here is the JVM which is 1.4.1_01-b01. In our production server (server I mentioned earlier) is having JVM 1.4.2_06-b03.
Why do think is this difference? Is it because of JVM or some misconfiguration?
Regards

Installation Java Editor in my Computer , non OK

I have a computer whit Windows 98 and I can't to install JAVA EDITOR NETBEANS . Error;
Not Kit (JDK) was found on this system ( its false) im my system reside JDK 5 Version) , follow this another message :
IMPOSIBLE INDIVID A JVM adap. Select a JVM in their file java.exe
Help me.

tell me what editor uses you, and who I can to
install a editor Java in my computer (Windows 98) , I
need a editor Java for exercises source and test
source programs in Java .
Thanks Captain Morgan
Albert
(excusme my English) I speak Italian.I would suggest you don't get an IDE while you are still learning the basics. Just something that does syntax highlighting.

Do you have the java api on your computer?

Just an observation.
Earlier when i started java programing, i used alot of books and tutorials which i still do. when i was faced with a problem eg. a method to do this or that, i used to look for tutorials for how to do it, and sometimes i couldnt get. After Many months, i stumbled upon java api, a documents that cointains all methods, classes and interfaces in java. my output increased, posts in this forum to seek help reduced, and am happier now?
Dou you have this api in your computer? i personally think newbies can accelerate their learning path by having this two references
1. the java tutorial
2. the java api
your thoughts?

your thoughts?That it's time for you to stumble across the downloads section of this site and download jdk-6-doc.zip. You can download the Tutorials here
db
edit Lousy link parsing. Just go to the Tutorial home page and click the link provided.
Are https links not allowed? Crazy.
Edited by: Darryl.Burke

How to find out that we have Java machine on our computer (Windows)

I want to make setup prog which will search for Java machine (NOT ONLY SUN BUT ALSO OTHERS) and if it can't find any, it will install new in a bonus.

I don't have JAVA_HOME environment variable but i am sure i have java machine =)Yeah, kinda what I said. [url http://www.google.nl/search?q=get+list+of+installed+software]This search looked promising, though I haven't looked into it very deep.
Kind regards,
Levi

I have a lot of Java Consoles in my add on's. Do i need all of them? Or just the latest one?

I have Java Consoles in my add on's from version 6.0.03 to 6.0.22. I'm not sure how it's effecting my browser, except pages take a long time to load, a real long time, and seems to crash more too. What is the best way to deal with this? I am using version 3.6.12 Firefox on xp pro ser pak 3

You can uninstall (remove) the Java Console extensions and disable the Java Quick Starter extension, you do not need them to run Java applets.
See http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions
See also http://www.java.com/en/download/help/quickstarter.xml - What is Java Quick Starter (JQS)? What is the benefit of running JQS? - 6.0
Disable the Java Quick Starter extension: Tools -> Addons -> Extensions
Control Panel -> Java -> Advanced tab -> Miscellaneous -> Java Quick Starter (disable)

Can't run Java Programs from home computer

Hi, sorry if this is a simple problem.
I downloaded Java version 1.4.0_03 but can't get it to work. I have configured the PATH variable and the CLASSPATH but it isn't working.
If I type java -version the right stuff comes up.... so where have I gone wrong?
Any ideas much appreciated
Thanks
cat

I downloaded JDK
this is whats in the PATH variable:
;C:\Program Files\Java\j2re1.4.0_03\bin
and in the CLASSPATH:
.;C:\Program Files\PhotoDeluxe HE 3.0\AdobeConnectables;C:\Program Files\Java\j2re1.4.0_03\lib\tools.jar

Lots of Java installations - HELP

Hi,
Firstly, appologies if this is the wrong forum.
I have about 4-5 applications on my PC, each one has it's own \jre sub-directory and each one is a different version.
I also have a seperate Java installation, in its own directory structure, which is always kept upto date.
I run a software inspection program that checks for out of date programs, controls, etc. and it keeps highlighting the Java installations as insecure, bad, or just, out of date.
My question is, can I just delete the "old" java sub-directories from the applications and expect them to work by picking up on the JAVA environmental variables, - or, does it depend on the application ?
Thanks & Regards,

For the most part, a current Java version will run older Java programs. Some programs are written so as to require a certain Java version, and won't run on newer versions - however, this is not common, and there is no way (other than program documentation to know if that is the case.)
Java's JRE installations involve Registry entries that need to be removed by uninstalling Java. Never just delete Java directories unless you have already performed an uninstall and are cleaning up something that is left over.
Uninstall in the reverse order of install. My suggestion (without knowing what exists) is to uninstall all Java versions, and then go to java.com and install the current version. The current version will probably run all of your existing programs - and it will use existing environment variables, etc (which should be verified, of course.)

I have a lot of movies on my computer and need to free up memory. What is the best solution, if I think I may need these movies in the future?

I'm an elementary music teacher and my students perform regularly so I have a lot of their performances on my computer. Now I need to free up memory so am wondering what the best solution would be, given that I may need access to these movies again in the future.
I do have an external hard drive, but have never been able to figure out if you can store movies on it, instead of on the computer hard drive.
Thanks so much!

Good evening,
I see you have another post about deleting movies and iDVD projects. Wanting the video to be available in the future is a significant criteria because video files are very large and are very compressed to fit on a DVD. If you want the video to be available in the future for additional editing (eg, highlights of the year), ideally you'd want to save the video in a format which will easily allow this. To me, this suggests you delete the iDVD projects but keep the iMovie files for future editing. This accomplishes the easy editing objective but keeps a lot of large files on your hard drive (each iMovie/iDVD project will be about 20% smaller -- assuming a 4 to 1 compression).
If you are willing to accept some additional work in the future and are okay with some reduction in video quality, you can pull sections from an existing DVD and use iMovie to combine them. The extra work is required to decompress the DVD, and this is also the reason for loss of some sharpness. This strategy reduces the file size of your combined projects by about 80% if you save disc images (virtual DVDs), or if you save the physical DVDs, you save 100% of the space.
I'd decide about the tradeoffs before jumping into action.
John

Lots of Java's on my computer

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