android-sdkandroid-studiojdkopenjdk
I installed Android Studio in Ubuntu by following two commands:
sudo apt-get ubuntu-makeumake androidIt installed with OpenJDK bydefault using Ubuntu Developer Tool.
Now I want to change JDK from Open JDK to Oracle JDK. Should I do it? If yes, why? If not, then how do I change the JDK to Oracle?
I'm using OpenJDK 7 with Android Studio and it works just fine. (I don't even have Oracle JDK installed at the moment.)
On that screen that you are showing (Project Structure-->SKD Location) I have the following path for the JDK location: /usr/lib/jvm/java-1.7.0-openjdk-amd64.
Install Oracle/Sun Java. See How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE? (and others) for details.
In a terminal session, run : sudo update-alternatives --config java
You will get a list that looks something like this:
As per the instructions at the prompt, enter the number corresponding to the version you want to be your system default Java implementation.
Once you've done that, unless there are configuration settings directing otherwise for particular applications (quite common), the Java version you've chosen will be your global system default.
I would definitely not recommend removing entirely the OpenJDK. There are any number of modules and applications that may be expecting OpenJDK to be there and are configured to use it - it's the default Java that comes with Ubuntu. Removing it may cause some serious problems. Leave it in place for those modules that expect it, because it is the default. You have set the default to what you want, and you can control the applications you are using to use that setting (in fact you can do it on an application by application basis without changing the system default at all) - but not everything is under your control, at least not without some serious expertise and mucking around.
Best Answer
Why choose Oracle Java?
Oracle Java is what most Java projects use. They test their products using it. They don't usually test their products on OpenJDK.
This means that bugs get fixed when they show up on Oracle Java. Bugs don't usually get fixed when they show up only on OpenJDK.
If you want a less buggy experience in general, Oracle Java is a better option.
Installing Oracle Java the nice way
Ubuntu's APT package manager makes it easy to install software, uninstall software, and update software. If you want these benefits with Oracle Java, do the following (replace
java8with the version you want; for example, to get Java 9, installoracle-java9-installerinstead):To switch between installed JDKs
List Java alternatives:
Find the line with the Java you want.
Remember the first part of the line. For example, Oracle Java 8's line might look like this on your system:
The first part of the line there is
java-8-oracle.Set the first part of the line you want as the Java alternative (replace
java-8-oraclewith the Java you want):