You just need to download a new version and make sure your JAVAHOME points to the new version of Java.One of the hardest thing to mater is not any feature but environment-specific details which nobody teaches.To bridge that gap, I am going to cover a couple of very important environment variables like PATH and JAVAHOME.
Set Java Home Download A NewThe JAVAHOME environment variable points to the JDK installation directory and used by many Java tools and applications like Tomcat, Maven, Eclipse, NetBeans or IntelliJIDEA, etc. Like in the previous article, I explained a Maven issue ( invalid target release: 1.7, 1.8 ) related to Java version, which occurred even though the correct version of Java installed on the machine, but JAVAHOME was pointing to an older version. Unfortunately, When you install Java on Linux or Windows, this environment variable is not set automatically. Java developers like me always set mandatory environment variables like JAVAHOME, PATH, and CLASSPATH on the login scripts executed by the shell when you log in to Linux like bashprofile.sh, but you can also set JAVAHOME into etcprofile for all users. Set Java Home How To Find TheIll show you steps on how to find the location of Java and how to set up the JAVAHOME in Linux in this article, and these steps should also work with any Linux or Java version like Ubuntu, RedHat, CentOS, SUSE, ArchLinux, Debian, Fedora, etc. Though I strongly encourage every Java developer to learn Linux, its a really important skill and serves you for a long time. If you decide to improve your Linux skill this year, I suggest you take a look at the Learn Linux in 5 Days and Level Up Your Career course on Udemy, which is both short and sweet and also explains all important details. ![]() All you need to is find the location of JDK, which you can find either by printing PATH as follows echo PATH. Though dont forget to open another shell window by typing bash, csh, or ksh. The new environment variable will not be added to an existing shell, you need to open a new shell window. Also, if you use bash shell than adding into.bashprofile make sense, if you use csh (C shell) then add JAVAHOME into.cshprofile and similarly for ksh (K shell) add JAVAHOME into.kshprofile. They are hidden files in your home directory in Linux, thats why they had prefix dot (.) in their name. You can use ls - alrt command to see them. Here is a sample etcprofile file with JAVAHOME and PATH variable defined for your reference. Once you are done with installation just find the folder where JDK is installed and follow the steps given above to set JAVAHOME for your Linux environment. For applications, JAVAHOME is generally referred on start script. Its bad practice to refer hardcoded path of Java installation in scripts, you will never find Tomcat, Maven, Eclipse, NetBeans or IntelliJ doing that because then when you update to a new Java version they wont be able to use it until you change their start script. Using JAVAHOME makes it easy to switch to a different or new Java version. See The Complete Java MasterClass course on Udemy to learn more about the core concepts of Java in detail. Its updated for Java 11 and also not very expensive, I just bouthbought11 a couple of days ago. Even though many developers know about JAVAHOME, they dont set in their environment due to various reasons. I strongly recommend you to set JAVAHOME, PATH, and CLASSPATH for your development environment. Set Java Home Upgrade JDK WithoutHere are some reasons why you set JAVAHOME in Linux 1) Its easy to upgrade JDK without affecting your application startup and config file, which points to JAVAHOME.
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