Using libraries in an older java version

Hi:

Has someone ever imported libraries compiled in for example java 1.3 in a project compiled with 1.2?? did you have any problem? how did you fix it?

In the company i work for is migrating an application from 1.2 to 1.3 but some other applications still will use 1.2 but the import some classes from the aplication migrated to 1.3. I know that is supossed that should be compatibility but mmmm... im not really sure.

Thanks

You won't be able to get Java 1.3 libraries to work in something you are compiling in Java 1.2, but it should work the other way round.

But why are you using Java 1.3 when Java 6 has been available for 6 months?

Originally posted by Campbell Ritchie:
But why are you using Java 1.3 when Java 6 has been available for 6 months?

Campbell, in the world of business, companies always want to spend as little money as possible on IT. They don't upgrade their Java version whenever a new version is out, because upgrading costs time and money. Generally companies keep using the software that they have until there is some business reason to replace it by something new. And even when building something new, they'd rather stick with proven technology than with the latest and greatest.

I've just finished a project for one client and I've started on a different project last week. The previous project was Java 1.4, the new project is Java 5. The new project is the first Java 5 project I'm doing for a client. (I've been using Java 5 and 6 for lots of other things, but not for projects for clients yet).

Posted by Jesper Young

spend as little money as possible on IT

Thank you. I can see it would be profitable to be behind the times.

Just like the post yesterday on the beginner's forum about the employer who thought people might not be able to use JavaScript?

If I had to pay for Java myself I wouldn't have upgraded it!

They don't upgrade their Java version whenever a new version is out, because upgrading costs time and money.

Quite true, especially if the new version doesn't provide many immediately beneficial features.

Still, having a project to move to 1.3 now seems quite odd (it has been EOL'ed). I, too, am curious what the reason for that might be.