Can older verion of java run with new version ?

I am new to java.I confuse with the version of java.
I have buit system,like a website,with 1.1.8 version of java . Now, I will promote the JVM to the new version , like 1.2 version . What i will watch ? Is that ok ?
Thanks everybody.

Yeah, it's ok - Java is backwards compatible. But you might want to check that it works first. Most old parts of the API have remained the same from the day they were first released, but you might get problems with methods like getX in the class java.awt.Point or getWidth in the class java.awt.Dimension.

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How to run java older version java program with newer version 1.6.

Hello frds.....i have a one query regarding jkd newer version. I was using older version of jdk 1.4 for my java program and projects' work. Now i installed newer version of java 1.6 in my machine, so when i tried to compile and run my older version programs in the newer version, its showing many errors. So can anybody helps me on this query that how can i run my older version java programs in newer version 1.6 or what types of changes i will be do in my java programs.
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EJP wrote:
so when i tried to compile and run my older version programs in the newer version, its showing many errorsI doubt it. There is only one incompatibility between 1.4 and 1.6, and that is the introduction of the 'assert' keyword. (or did that happen in 1.4?)I believe that was the one and only incompatible change made in 1.4.
(Although I'm saying that from memory, and 1.4 was a long time ago -- so the "one and only" part could be wrong.)

Can no longer copy and paste with new version. Articles you provided did not help.

When I try to copy and paste in firefox it says I can't do it any longer. It's a security issue, and the "learn more" tab gives some abstruse directions about completely closing firefox, and then getting back in without opening it to a place I can't find.
Could you please tell me how to re-enable these necessary functions in an understandable way?

Is this only on one website? some websites disable copy and pasting for various reasons.
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Download and Run TDSSKiller [http://support.kaspersky.com/faq/?qid=208283363 http://support.kaspersky.com/faq/?qid=208283363]
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"Can't open...created with newer version of iTunes...Missing most of Songs!

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Hello,
iTunes 8.2.1 is pretty outdated. Please go to http://www.apple.com/itunes/download/ and install the current iTunes 10.2.2
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Itunes.itl; can't be read as created with newer version of iTunes? This is what I am tyold when trying to get into my itunes....help!

Suddenly I cannot open iTunes, the above message is what I receive. I have done a bit of trolling the web in an attempt to fix it, but still no joy, anybody out there......help,,!

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tt2

I have just just installed a new version of itunes. When i tried to run the new version it came up with the message "The file ituneslibrary.itl cannot be read because it was created by newer version of itunes. Can anybody advise?

I have just just installed a new version of itunes. When i tried to run the new version it came up with the message "The file ituneslibrary.itl cannot be read because it was created by newer version of itunes.
I installed the new version because itunes had not recognised my ipod nano 5G, and told me to reinstall. Itunes selected which version to install, so I don't understand what is going on. To add insult to injury it installed a pile of malware which I am still trying to get rid off.
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Hello Davedamoclese,
Go through the below link to Remove iTunes and all its components from your computer first and then Re-install fresh copy of iTunes on your computer.
http://support.apple.com/kb/HT1923
Note : DO not delete iTunes Library as it contains all your iTunes data, please go through the below link for where it is saved on your computer :
http://support.apple.com/kb/ht1391
You can download the latest version of iTunes from the below link :
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How can I get an older iTunes U account enrolled in newer version of iTunes U?

My institution originally signed up for iTunes U in 2010, but due to various reasons, we never went live with our site. We are now ready to proceed, but we need to get enrolled in the newer version of iTunes U. I was directed to go to https://eduapp.apple.com and send a note saying that we wanted our older, private account enrolled in the newer version, but for whatever reason, I cannot log in, despite trying multiple computers and browers. I know my Apple ID and password are correct, as I just logged into this site with them. Is there anyone on here who can help me? The institution is Aiken Technical College.
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I downloaded the new firefox and now I get an error stating it won't run with my version of Mac OS? What is the fix?

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Can older verion of java run with new version ?

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