sun-java6-jdk vs. openjdk-6-jdk

[sefs]

Is the openjdk now the way forward. I currently have sun-java6-jdk. I just wanted clarification that the openjdk is now the offical install from here on out for the java programming language.

Thanks.

[jespdj]

The best version of Java to use at the moment is Sun Java 6.

OpenJDK is Sun's project to make their Java implementation fully open source. The next version of Sun Java (Sun Java 7, expected no sooner than March 2010) is going to be based on OpenJDK.

The version of OpenJDK that's in the Ubuntu repository is a Sun Java 6-compatible version of OpenJDK; it's basically the same as Sun Java 6, but with some proprietary parts (that Sun didn't write themselves) replaced by open source software (parts of the font rendering, graphics and sound stuff).

For the most part, OpenJDK works well with most Java applications, but unfortunately it is not 100% compatible with Sun Java 6, which causes problems with some Java programs, especially some online banking Java applets.

For Java software development, it really doesn't matter if you take the Sun JDK or the OpenJDK JDK, because the APIs are exactly the same. Just the implementation is different.

[drubin]

Originally Posted by jespdj For Java software development, it really doesn't matter if you take the Sun JDK or the OpenJDK JDK, because the APIs are exactly the same. Just the implementation is different.

Generally that is ok even more so with cli applications. For Gui I would recommend not using the openjdk thee have been quite a few threads on this forum about users having issues with openjdk and swing. (mostly with alignment and look).

But generally if you code for openjdk and run your app on only openjdk it should be ok.

[sefs]

Thanks, I just tested it and realise that a swing app I have here displays a bit differently in truth, not as neat as the sun distribution.

[eye208]

Originally Posted by sefs Thanks, I just tested it and realise that a swing app I have here displays a bit differently in truth, not as neat as the sun distribution.

Make sure to install the Lucida TrueType font. This has been the default font in Swing applications until OpenJDK. It is missing in the OpenJDK package but available separately.

[krazyd]

Some apps don't work at all with openjdk. Eg. BlueJ.

[jespdj]

Originally Posted by eye208 Make sure to install the Lucida TrueType font.

There's a package named sun-java6-fonts which will install fonts for Sun Java 6.

[eye208]

Originally Posted by jespdj There's a package named sun-java6-fonts which will install fonts for Sun Java 6.

Yes, but if you install that, sun-java6-jre will be installed, too. That doesn't make much sense if you want to use OpenJDK anyway.