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hi everyone welcome back to our Channel
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today we will show you how to install
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24.4 we will cover both open jdk and
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Oracle jdk so that you can choose the
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best one for your needs before we start
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let's quickly understand the difference
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between these two open jdk stands for
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open Java development kit this is free
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and open source version of java it is
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widely used and Main by Java Community
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it is a default choice for most Linux
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distributions Oracle jdk is the Oracle
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official Java distribution which
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includes additional performance
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optimizations and Commercial features it
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is often required for the Enterprise
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applications now we know the difference
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let's get started the first step is to
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install all the available updates for
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that log into your obuntu system open
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the terminal run the command sudu
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upgrade i y h enter this command will
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take 3 to 4 minutes depending upon your
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once all the updates are installed then
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we will move to the open jdk
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installation open jdk package and its
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dependencies are available in the
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default package depositories of open to
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24.4 so it installation is
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straightforward let me clear the screen
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first and run the command sud do space
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app space install space default hyphen
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so this command will install open jdk 21
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LTS which is officially supported
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enter after the installation verify the
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Java version with the
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command Java space hyphen hyphen version
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in the output we can clearly see we have
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installed open zdk 21 in case you want
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to install specific version of java
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let's say Java 11 or Java 17 or Java 21
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for that you need to run the
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hyphen let's say I I want to install
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Java 11 then typee here 11 then hyphen
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jdk hyphen y so this command will
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install Java 11 if you want to install
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11 type 17 and for 21 in place of 17
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type 21 let's assume I want to install
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Java 11 as well so run this
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if you need to install Oracle jdk then
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first we need to download its debin
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package from Oracle website in Google
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search download Oracle
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enter go to it official website
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so at the time of creating this video
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tutorial we have Java
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package click on this
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URL it will start downloading the Debian
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package in your downloads folder once
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completed go back to your
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terminal go to the downloads folder
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and if you do LS here you will get this
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dein package in order to install this uh
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Oracle zdk we need to run the
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now if you run the command Java space
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hyphen version you should see uh Java
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23 great the output confirms that we
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have installed Java 23 which is Oracle
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jdk as you know we have installed
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multiple Java versions on our obuntu
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system now we will see how to configure
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the default Java version for that we can
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run the command update hyphen
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command complete Command would be sud do
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Alternatives space hyphen hyphen config
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enter let's suppose I want to set this
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Java 21 as my default Java for that
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select the number so for Java 21 we need
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enter and if you rerun the Java version
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command you should see that default Java
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version is open ZK 21 next set Java unor
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home environment variable in order to
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set this environment variable first we
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need to find Java installation path if
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you see the output of update alternative
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space hyphen config Java command output
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you will see the path of different Javas
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so for 21 this would be the installation
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path so copy this path till AMD
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environment Define a variable
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that installation path you have just
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file in order to make the changes into
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the effect we need to Source this file
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and the command Source space
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environment verify that Java uncore home
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is set correctly or not you can run the
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command EOS space dollar Java uncore
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home great output confirms that we have
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a environment variable javore home whose
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one before compiling any Java program
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make sure both Java and Java
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compilers are pointing to the same Java
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version in order to change the Java
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version Let run this command
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again use Java C and hit
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enter type two here and hit enter now
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that Java is installed let's write a
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sample Java program to test our setup
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create a file with the name hello world.
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here is the sample code save and close
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file now compile this program using the
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Java now run the program with the
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great our program is executed
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successfully I can see the
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output that's it you have successfully
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installed Java on your OB to2
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24.4 and you have tested a sample hello
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world program now you are ready to start
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developing Java applications if you
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found this tutorial helpful do not
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forget to like subscribe and hit the
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notification Bell for more Linux
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tutorials let us know in the comments
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which Java version you are using thanks
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for watching watching see you in the
