I am using oracle jdk but I want to know whether openjdk will cause any problems if installed and used?
What is the best?

Try both. It depends on for what you use it, so IMO there's no definitive answer.

But if you are in a mood of "If it ain't broke, don't fix it", just keep what you have.

The only problem I have seen with openjdk/openjre is an inability to complete the java verification on the Oracle website.

Granted, the only thing I've used java for in the past few years is minecraft, but the OpenJRE has been just fine. It's come a long way in the past few years. The OpenJDK, as I understand it, is for people who need to develop/write java.

The Oracle JDK is based on the OpenJDK source but they also add some closed source components before releasing the final product.

I have not had a problem running anything using OpenJDK but I do see commentary sometimes stating a particular Java app only works correctly with the Oracle JDK. I have downloaded a few things that state the same thing, but they seem to run fine with OpenJDK.

If a pure open source implementation is your goal then replacing Oracle JDK with OpenJDK should be fine. But if that doesn't matter, then as a previous poster stated, if it ain't broke don't fix it.

Works for me. On http://java.com/verify my openjre 7u65 is properly detected, and because Oracle just released a newer version mine is flagged as outdated:


Eric

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In that case, it must be an issue with the NoScript plugin, which I use as a matter of course. That java verify link fails to complete for me on three machines using your openjre builds (32 and 64bit) with Firefox, despite telling NoScript to allow all on that page.

I have a couple of Java applications plus I manage a fairly large group of collections with DSpace. I have had trouble with all using OpenJDK (over a few years now) but none with Oracle JDK (which is the development kit; JRE is the run-time). DSpace is built with Java; it will build with Oracle JDK, it will not build or run properly (in my experience) with OpenJDK.

Slackware comes with, in the /extra directory, a SlackBuild for JDK (you've probably been using that, but just in case). When you install JDK you also install JRE with it so there's no problem with compiling Java source and executing Java applications that require JRE. You should, after installing either JDK or JRE disable the Java Plug-in in all browsers you use; just do it and avoid any trouble.

In my book, if I have problems with open source and there is a proprietary (or quasi-proprietary) version available, I vote, in this case, for Oracle (and I do not like anything about Oracle as an organization; I have to hold my nose and hit the enter key).

Like Dieder says, it ain't broke, don't fix it.

Hope this helps some.

OpenJDK has served me well in my projects, but I recently found that android studio is buggy with OpenJDK. I gave it its own private oracle jdk.