Several JDK:s on the same computer?

Is it possible to run several JDK�s on the same machine (and JRE�s)?
I have this problem: I�m doing some J2ME development, but JDK 1.5 does not seem to be supported at least with MIDP 1.03 (or vice versa...). So, in order to be able to do J2ME development with MIDP 1.03 I need to install JDK 1.42, in other words downgrade from JDK 1.5. On the other hand, I need 1.5 for some "normal" programming for the pc. Also I would like to run the newest JRE plugin for the browsers.
So, can I install both 1.42 and 1.5 JDK�s on the same machine, as well as both JRE�s 1.42 and 1.5? Will this cause problems and conflicts?
If this is possible, how should I set up the installations so that the browsers would use the newest version of JRE, and so that pc development would use the 1.5 version, and finally the J2ME development would use the 1.42 version?
Thanks in advance,
Tomi

Yes, you can have both.
First, whichever one you want to be 'default' (the JRE you want the browser to use), you should install second. So, for instance, you want the browser to use the 5.0 JRE, so you would install Java 1.4.2, then Java 5.0. The you would make sure that your OS' PATH variable includes that version's bin directory (both JRE and JDK).
Now, when you are doing J2ME developement, or other actions that need to use 1.4.2, you will have to specify the bin directory for the 1.4.2 directly. For example, run the program with:
c:\java\jre1.4.2\bin\java -cp ... ...
and the same for compiling:
c:\java\jdk1.4.2\bin\javac -cp ... ...
I am not particularly sure how to set the compiler to use for J2ME, if you find problems doing this, then try to reverse just the order of the JDK install:
Install JDK5.0 first, then JDK 1.4.2, set the JDK 1.4.2 as the JAVA_HOME and inside the PATH.
But keep the JRE5.0 as the default runtime.

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Application Builder Question: how to install several applications in the same computer?

Hello,
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aespin wrote:
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How can I unlock my iPad if I forgot the passcode?
http://www.everymac.com/systems/apple/ipad/ipad-troubleshooting-repair-faq/ipad- how-to-unlock-open-forgot-code-passcode-password-login.html
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http://support.apple.com/kb/ht1212
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http://tinyurl.com/7ndy8tb
How to Reset a Forgotten Password for an iOS Device
http://www.wikihow.com/Reset-a-Forgotten-Password-for-an-iOS-Device
Using iPhone/iPad Recovery Mode
http://ipod.about.com/od/iphonetroubleshooting/a/Iphone-Recovery-Mode.htm
Saw this solution on another post about an iPad in a school environment. Might work on your iPad so you won't lose everything.
~~~~~~~~~~~~~
‘iPad is disabled’ fix without resetting using iTunes
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~~~~~~~~~~~~~
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https://appleid.apple.com/cgi-bin/WebObjects/MyAppleId.woa/
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pajagsfan wrote:
Can I create more than one library on the same computer? Just got an ipod for my wife but didn't want her to have to use my library to sync to, so I thought I created another library for her. When I deleted my albums from her library the disappeared from mine. (I think?)
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Hi Mereditty,
Here are all the links I have for sharing a couple of different ways.
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About shared photos
Turning off photo sharing
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Leo,
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