Here are some methods that we’ll use to install Java on our system.

• By installing Oracle Java SE Development Kit 14
• Installing from PPA Repository
• By installing manually

We will cover all of these methods so you can install easily by choosing your preferred one.

Step 1: Installing Oracle Java SE Development Kit 14

You can download the Debian package of Java 14 at Java SE Development Kit official page. If you want to download it manually, simply run the command with wget & curl.

So, as usual we do, update your system and install wget and curl.

sudo apt update 
sudo apt -y install wget curl

After installing these, pull the Java SE Development Kit 14 Debian package by running the below command.

wget --no-check-certificate -c --header  "Cookie: oraclelicense=accept-securebackup-cookie" "https://download.oracle.com/otn-pub/java/jdk/14+36/076bab302c7b4508975440c56f6cc26a/jdk-14_linux-x64_bin.deb"

Output:

jdk-14_linux-x64_ 100%[=============>] 157.91M   955KB/s    in 3m 14s  
2020-03-30 02:15:10 (835 KB/s) - ‘jdk-14_linux-x64_bin.deb’ saved [165583792/165583792]

Now, with the help of apt install the DEB package by typing

sudo apt install ./jdk-14_linux-x64_bin.deb

And then press Y when prompted to continue. You’ll see the similar output on successful installation.

sudo apt install ./jdk-14_linux-x64_bin.deb
 Reading package lists… Done
 Building dependency tree       
 Reading state information… Done
 Note, selecting 'jdk-14' instead of './jdk-14_linux-x64_bin.deb'
 The following NEW packages will be installed:
   jdk-14
 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
 Need to get 0 B/166 MB of archives.
 After this operation, 0 B of additional disk space will be used.
 Get:1 /home/sabi/jdk-14_linux-x64_bin.deb jdk-14 amd64 14-1 [166 MB]
 Selecting previously unselected package jdk-14.
 (Reading database … 121590 files and directories currently installed.)
 Preparing to unpack …/sabi/jdk-14_linux-x64_bin.deb …
 Unpacking jdk-14 (14-1) …
 Setting up jdk-14 (14-1) …
 sabi@Ubuntu-18:~$ 

After it set the Java Environment Variables to use it in command line operation.

cat <<EOF | sudo tee /etc/profile.d/jdk14.sh
export JAVA_HOME=/usr/lib/jvm/jdk-14
export PATH=\$PATH:\$JAVA_HOME/bin
EOF

Now, source the file by

source /etc/profile.d/jdk14.sh

Then verify the installation by running java -version command.

Output:

sabi@Ubuntu-18:~$ java -version
 java version "14" 2020-03-17
 Java(TM) SE Runtime Environment (build 14+36-1461)
 Java HotSpot(TM) 64-Bit Server VM (build 14+36-1461, mixed mode, sharing)

Step 2:Installing Java 14 from PPA Repository

In first step we installed the Java by using Java 14 SE Development Kit. Now, we will use the PPA repository to install Java 14 on our system. As the Java binaries are being available on the PPA repository, so we’ll add the repo with the help of given command.

sudo apt update
sudo add-apt-repository ppa:linuxuprising/java

Then install the Oracle Java 14 using the below command

sudo apt -y install oracle-java14-installer

Then accept the licence, and digital technology license agreement when prompted.

You can also set it to the default by installing the following package.

sudo apt -y install oracle-java14-set-default

Verify the installation by running the java -version command

java -version

After it set up the Java Environment Variables.

sudo nano /etc/profile.d/jdk.sh
export JAVA_HOME=/usr/lib/jvm/java-14-oracle
export PATH=$PATH:$JAVA_HOME/bin

Now, source the file

source /etc/profile.d/jdk.sh

Step 3: Installing Java 14 Manually

Install the Java 14 manually using the curl command. You can also download the package from the download page.

curl -O https://download.java.net/java/GA/jdk14/076bab302c7b4508975440c56f6cc26a/36/GPL/openjdk-14_linux-x64_bin.tar.gz

Once the package is downloaded, extract it

tar xvf openjdk-14_linux-x64_bin.tar.gz

Then move the output to the /opt directory

sudo mv jdk-14 /opt/

And after it set up the Java environment.

sudo tee /etc/profile.d/jdk14.sh <<EOF
 export JAVA_HOME=/opt/jdk-14
 export PATH=\$PATH:\$JAVA_HOME/bin
 EOF

Then source the file.

source /etc/profile.d/jdk14.sh

Verify the installtion

$ echo $JAVA_HOME
 /opt/jdk-14

$ java -version
 openjdk version "14" 2020-03-30
 OpenJDK Runtime Environment (build 14+36-1461)
 OpenJDK 64-Bit Server VM (build 14+36-1461, mixed mode, sharing)

So, this is how you can Install the Java on your Ubuntu/Debian system or server.

The post How To Install Java 14 on Ubuntu / Debian appeared first on Linux Windows and android Tutorials.

It is used for various purposes like developing web applications, android applications, games development and much more. So, let’s move towards the installation of Java 14 on our CentOS system.

Here we’ll see the two methods to install Java 14 on CentOS 8 you can choose your preferred one for an easy installation.

Check out this

How to Install Java 14 on Ubuntu / Debian.

Step 1: Installing Java 14 on CentOS 8

Go to the official release page of JDK 14 for downloading the latest archive or use the below command to download it using the terminal.

sudo yum -y install curl
curl -O https://download.java.net/java/GA/jdk14/076bab302c7b4508975440c56f6cc26a/36/GPL/openjdk-14_linux-x64_bin.tar.gz

Output:

[sabi@localhost ~]$ curl -O https://download.java.net/java/GA/jdk14/076bab302c7b4508975440c56f6cc26a/36/GPL/openjdk-14_linux-x64_bin.tar.gz
   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                  Dload  Upload   Total   Spent    Left  Speed
 100  189M  100  189M    0     0   412k      0  0:07:50  0:07:50 --:--:--  563k

Now, extract the above package

tar xvf openjdk-14_linux-x64_bin.tar.gz

Then move the output to the /opt/ directory

sudo mv jdk-14 /opt/

And set up the Java Environment variables.

[sabi@localhost ~]$ sudo tee /etc/profile.d/jdk14.sh <<EOF
  > export JAVA_HOME=/opt/jdk-14
  > export PATH=\$PATH:\$JAVA_HOME/bin
  > EOF
   export JAVA_HOME=/opt/jdk-14
   export PATH=$PATH:$JAVA_HOME/bin 

Now, source the file

source /etc/profile.d/jdk14.sh

Verify the installation using

$ echo $JAVA_HOME
 /opt/jdk-14
 $ java -version
 openjdk version "14" 2020-03-30
 OpenJDK Runtime Environment (build 14+36-1461)
 OpenJDK 64-Bit Server VM (build 14+36-1461, mixed mode, sharing)

Step 2: Installing Java SE Development Kit 14 on CentOS 8

As in one step we’ve installed the Java 14 using curl now we’ll install the Java SE Development Kit 14 on CentOS 8. For this you can go to the Java page and download the RPM package or by running the below command.

curl -LO -H "Cookie: oraclelicense=accept-securebackup-cookie" \
"https://download.oracle.com/otn-pub/java/jdk/14+36/076bab302c7b4508975440c56f6cc26a/jdk-14_linux-x64_bin.rpm"

Once, the package is downloaded, install it with the help of yum or rpm command.

$ sudo rpm -Uvh jdk-14_linux-x64_bin.rpm
 warning: jdk-14_linux-x64_bin.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY
 Verifying…                                                            (10################################# [100%]
 Preparing…                                                            (10################################# [100%]
 Updating / installing…
    1:jdk-14-2000:14-ga                ################################# [100%]

Verify the installation of Java 14 by running

java -version
java version "14" 2020-03-30
 Java(TM) SE Runtime Environment (build 14+36-1461)
 Java HotSpot(TM) 64-Bit Server VM (build 14+36-1461, mixed mode, sharing)

Now, set up the Java environment

cat <<EOF | sudo tee /etc/profile.d/jdk14.sh
 export JAVA_HOME=/usr/java/default
 export PATH=\$PATH:\$JAVA_HOME/bin
 EOF

Then source the file

source /etc/profile.d/jdk14.sh

Step 3: Set Java Version as Default Version

If you’ve installed multiple java version, you can configure them to choose which one is default.

sudo alternatives --config java

So, this is how you can install Java 14 on CentOS8.

The post How To Install Java 14 on CentOS 8 / RHEL 8 appeared first on Linux Windows and android Tutorials.