how to install JDK in fedora?

 To install jdk in fedora are actually many ways ...!! but I will teach you how to install manually using .RPM. 

 why???. . .

 because I want you to understand how to install the JDK manual with .RPM files.

 ok. . . .!!!  before you install the JDK in your computer. Your downloads jdk on the oracle official website in link here ORACLE. 

 then select the appropriate platform your computer. because I use a computer with OS 64 bit then I downloaded the 64 bit and you must download file with directory .rpm example :

 jdk-8u121-linuk-x64.rpm

DOWNLOAD FILE HERE


if download finish. . please open your terminal and you must open root mode then open direktory downloads in terminal 

 example :
1. open your terminal in search or with push ctrl + t in keyboard menu.







2. then input the following command line 

[darsono@localhost ~] su
[root@localhost darsono]# cd Downloads

look this my terminal pictures :





3. then to do check file exists or not exis you input the following command line.

[root@localhost Downloads]# ls
jdk-8u121-linux-x64.rpm

look this example my pictures :


color red is file JDK witch we download for oracel official site




4. Once the file is found now we install files using rpm as follows:

[root@localhost Downloads]# rpm -Uivh jdk-8u121-linux-x64.rpm


look this example pictures  :



because by default Fedora it self already using OpenJDK. because I am here to work with Java 8 then I update the existing configuration to OracleJDK following command:


alternatives --config java

then if you enter command this... then look this pictures :



you can select the JDK active by typing the numbers in command. because that we had installed JDK 1.8.0_121 is then we choose the number 5 in input keyboard. and look the pictures.



look this picture simbols + in command one in number 3 and now simbols + located in number 5 because we are choose the number 5 as JDK active. 




5. then if you check javac version  will generate the following


look this pictures :




and finish... You now have already successfully installed JDK.
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