how to install jdk 8 in kali linux | computer me java version 8 install kaise kare | java jdk 8

 Step 1:

Download the latest JDK(jdk-8u321-linux-x64.tar.gz) from this official site.

 

<Downloads jdk8 file >

 

Step 2:

Open the terminal (Ctrl + Alt + T) and enter the following command

 

All Comand type

 

Step 3.

sudo mkdir /usr/lib/jvm

If the /usr/lib/jvm folder does not exist, this command will create the directory. If you already have this folder, you can ignore this step and move to next step.

3

 4step 4.

Enter the following command to change the directory.

cd /usr/lib/jvm

 

step 5.

Extract the jdk-8u321-linux-x64.tar.gz file in that directory using this command.

 

sudo tar -xvzf ~/Downloads/jdk-8u321-linux-x64.tar.gz

 

According to this command, the JDK filename is jdk-8u321-linux-x64.tar.gz and which is located in the ~/Downloads folder. If your downloaded file is in any other location, change the command according to your path.

 

Step 6:

Enter the following command to open the environment variables file.

 

sudo gedit /etc/environment

 

 

Step 7:

In the opened file, add the following bin folders to the existing PATH variable.

 

/usr/lib/jvm/jdk1.8.0_321/bin

/usr/lib/jvm/jdk1.8.0_321/db/bin

/usr/lib/jvm/jdk1.8.0_321/jre/bin

 

 

The PATH variables have to be separated by a colon.

Notice that the installed JDK version is 1.8 update 321. Depending on your JDK version, the paths can be different.

Add the following environment variables at the end of the file.

 

 

 

J2SDKDIR="/usr/lib/jvm/jdk1.8.0_321"

J2REDIR="/usr/lib/jvm/jdk1.8.0_321/jre"

JAVA_HOME="/usr/lib/jvm/jdk1.8.0_321"

DERBY_HOME="/usr/lib/jvm/jdk1.8.0_321/db"

 

 

The environment file before the modification:

 

 

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games"

 

 

The environment file after the modification:

 

 

 

PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/jdk1.8.0_321/bin:/usr/lib/jvm/jdk1.8.0_321/db/bin:/usr/lib/jvm/jdk1.8.0_321/jre/bin"

J2SDKDIR="/usr/lib/jvm/jdk1.8.0_321"

J2REDIR="/usr/lib/jvm/jdk1.8.0_321/jre"

JAVA_HOME="/usr/lib/jvm/jdk1.8.0_321"

DERBY_HOME="/usr/lib/jvm/jdk1.8.0_321/db"

 

 

Step 8:

Enter the following commands to inform the system about the Java's location. Depending on your JDK version, the paths can be different.

 

sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0_321/bin/java" 0

 

sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0_321/bin/javac" 0

 

sudo update-alternatives --set java /usr/lib/jvm/jdk1.8.0_321/bin/java

 

sudo update-alternatives --set javac /usr/lib/jvm/jdk1.8.0_321/bin/javac

 

Step 9:

To verify the setup enter the following commands and make sure that they print the location of java and javac as you have provided in the previous step.

 

update-alternatives --list java

 

update-alternatives --list javac

 

 

Step 10:

Restart the computer (or just log-out and login) and open the terminal again.

Step 11:

Enter the following command.          

 

java -version