WHY Install Oracle’s Java?

This article updates the previous blog on Java and Android Studio on Ubuntu 14.04 (Trusty Tahr). Oracle’s Java is currently at version 66 and Google’s Android Studio is now at version 1.5.1. That is in addition to Ubuntu which reaches versions 14 now.04.3. Due to these changes, I have made a decision to update this post. This short article is a ‘how-to’ for setting up Oracle’s Java JDK 8u66 (or SE 8u66) and Google’s Android Studio 1.5 on Ubuntu Linux 14.04.3 (Trusty Tahr). If you wish to develop software on the Android platform on your Ubuntu 14.04.3 PC, this ‘how-to’ is for you then.

Note that most necessary steps are performed at the command collection in a terminal – if you are not acquainted with this, I suggest reading about any of it first before trying out this ‘how-to’. Notice from the output that there is no mention of Oracle’s Java at all. So why install Oracle’s Java? Good questions and the answer is that Oracle’s Java is recommended by Google.

Should you intend to use Java for Android development, then Google says it is better to use Oracle’s version – their Android Studio says that there are stability problems with OpenJDK. Whether this holds true is a moot point – should you intend to do Google android programming later here, then set up Oracle’s Java – else, any Java can do, even OpenJDK. This short article assumes that there is no Java installed on your Ubuntu 14.04.3 PC.

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If you’d installed other Java previously, then you need to make a decision – keep that Java and install Oracle’s Java or remove that Java and set up Oracle’s Java in its place. That decision is completely up to you nevertheless, you need to remember that Google’s Android Studio suggests Oracle’s Java. 66). It is also recommended that you download the API documents, demos, and examples for the JDK – although this isn’t required for Android development on Android Studio.

The last two commands in the above mentioned is only relevant if you have downloaded the demos and the documents. 66′ directories in the folder. The first command word will generate the ‘/usr/lib/jvm’ directory website. 66′ directory to ‘ /usr/lib/jvm’ – where in fact the root of all Java related files resides. The final command word will place you back to your home-website directory.

66′ website directories – even your home directory! 66′ directories in ‘ /usr/lib/jvm’ is highly recommended as this will maintain the series with other Linux distro’s placement of the Java files. This entire article reflects that recommendation. 66′ website directories are within your name and group still. 5 root root 4096 Jun 24 14:55. The next matter to do is to inform Ubuntu 14.04 where Oracle Java JDK resides and setup a default Java.

For this we use the ‘update-alternatives’ order. These will set up all the required links to Oracle’s Java, including a slave hyperlink for the ‘man’ webpages for Java. After the order has been performed, the default Java was set to Oracle’s Java. Oracle’s JDK 8 has been created properly. Now we have to set the environment variables and paths properly for the whole Ubuntu 14.04 system.

This will perform the nano text editor and open the ‘/etc/profile’ file for editing and enhancing. Now add (or edit) the following lines at the end of the file. Save the document and close it. HOME and PATH environment variables for your system. HOME environment variable points to the JDK root while the PATH environment variable will add the ‘/bin’ directory of the JDK to whatever path that was already specified. This will allow the ‘javac’ (the Java compiler) command to be executed from any directory website. Remember that the ‘javac’ command is not necessary to Android software development, but it could verify useful if you are running Java programs from a terminal. In addition, it would be useful if you are not used to Java and desire to test software from the order line through the learning process. Now log away and then sign in again to the system in order to make sure that both environment variables are arranged.

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