When you have multiple java installed, to identify which version of the java executable is used system-wide, do the following:Īs shown below, the java executable is pointing to /usr/bin/java The java executable is used from the JRE location (and not from JDK location).
The above ls output indicates that you can install multiple versions of jre or jdk on the same machine, as each and every version of the installation will get its own directory name with the version number in it. 1 root root 16 Jun 1 16:55 default -> /usr/java/latestĭrwxr-xr-x. Make sure that the jdk rpm is successfully installed.īy default, the above steps will install both jre and jdk under /usr/java directory as shown below. Install the Java 8 JDK on your system as shown below.
Here is the direct download link for JDK 8 Download.įor 64-bit linux, download the jdk-8u131-linux-圆4.rpm file, which is under “Linux 圆4”įor 32-bit linux, download the jdk-8u131-linux-i586.rpm file, which is under “Linux x86” Install Java 8 JDK Only Click on the “Download” link next to “JDK”. The latest version of Java 8 is available for download from here. If you are installing JDK, you typically don’t have to install JRE separately as all the binary files that are included with JRE is also included with JDK.
Note: If you are new to Java, and like to learn how to write a simple basic hello world java program, this might help: How To Write and Execute Java Program on Unix OS Download Java 8 JDK Only Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode) Java(TM) SE Runtime Environment (build 1.8.0_131-b11) In this example, as we see, this has installed the 1.8.0 version of java. Verify to make sure it is installed successfully. Install the downloaded jre rpm file as shown below. On this server, currently there is no java installed.
The radio button will disappear and you’ll see this message: Thank you for accepting the Oracle Binary Code License Agreement for Java SE you may now download this software.įor 64-bit linux, download the jre-8u131-linux-圆4.rpm file, which is under “Linux 圆4”įor 32-bit linux, download the jre-8u131-linux-i586.rpm file, which is under “Linux x86” Install Java 8 JRE Only To set the environment variables for a specific user, place the above variables in the ~/.bash_profile file.Click on the radio-button that says: “Accept License Agreement”. Set variables based on the Java location and version for all users.
For example, to run Java programs from anywhere, you need to set $JAVA_HOME and other variables to match your version of Java.Ĭreate a new file under /etc/profile.d directory. Java applications often require JAVA environment variables to be set in the system. The output may vary depending upon the package and the version you chose to be the default Java version. OpenJDK 64-Bit Server VM (build 11.0.12+7-post-Debian-2, mixed mode, sharing) OpenJDK Runtime Environment (build 11.0.12+7-post-Debian-2) Verify Java VersionĬheck the java version using the following command. Press to keep the current choice, or type selection number: 1Įnter the number below the selection column to set the default Java version.
There are 4 choices for the alternative java (providing /usr/bin/java).Ġ /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto modeġ /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual modeĢ /usr/lib/jvm/jdk-11.0.12/bin/java 2 manual modeģ /usr/lib/jvm/jdk-16.0.2/bin/java 1 manual mode If your system has multiple Java versions, then the command would list all Java versions like below. Use the alternatives command to set the default java version. Sudo update-alternatives -install /usr/bin/java java /usr/lib/jvm/jdk1.8.*/bin/java 3 Sudo update-alternatives -install /usr/bin/java java /usr/lib/jvm/jdk-11.*/bin/java 2 Sudo update-alternatives -install /usr/bin/java java /usr/lib/jvm/jdk-16.*/bin/java 1 Run update-alternatives commands to install Java on your system. Sudo tar -zxvf jdk-8u301-linux-圆4.tar.gz -C /usr/lib/jvm/ Install Oracle Java JDK/JRE Install / Extract the downloaded Oracle Java package. Wget -no-check-certificate -no-cookies -header "Cookie: oraclelicense=accept-securebackup-cookie" If you still want to use the command line, use the below command.