Discover how to install Java on CentOS 7 with this detailed guide. Follow our step-by-step instructions to set up Java Development Kit (JDK) and Runtime Environment (JRE) seamlessly. #centlinux #linux #java
Java is a widely used, high-level, object-oriented programming language developed by Sun Microsystems (now owned by Oracle). It was first released in 1995 and has since become one of the most popular programming languages due to its platform independence, portability, and versatility. Here are some key characteristics and aspects of Java:
Java is employed in a variety of applications, including web development, mobile app development (Android apps are primarily written in Java), enterprise systems, scientific and research applications, and more. Its versatility, performance, and robustness have contributed to its enduring popularity in the software development landscape.
In this article, we will install Java on CentOS 7 from RPM and from tarball.
Recommended Training for You: Complete Java SE 8 Developer Bootcamp – OCA Prep Included
Java and Python are two of the most popular programming languages, each with its own strengths and use cases. Here’s a comparison to help you understand the key differences and decide which might be better suited for your needs:
1. Performance:
2. Syntax:
3. Platform Independence:
4. Use Cases:
5. Libraries and Frameworks:
6. Community and Support:
1. Performance:
2. Syntax:
3. Platform Independence:
4. Use Cases:
5. Libraries and Frameworks:
6. Community and Support:
Both languages have strong communities and extensive libraries, making them powerful tools for a wide range of programming needs. The choice often comes down to the specific requirements of your project and personal or team familiarity with the language.
Read Also: How to install Java on Rocky Linux 9
Connect to java-server.example.com using ssh as root user.
Download Java JDK 11 RPM for CentOS 7 from Oracle Technical Network (OTN) and copy it to the home directory of root user.
Install the downloaded package using rpm command.
# rpm -ivh jdk-11.0.1_linux-x64_bin.rpm warning: jdk-11.0.1_linux-x64_bin.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY Preparing... ################################# [100%] Updating / installing... 1:jdk-11.0.1-2000:11.0.1-ga ################################# [100%]
Set JAVA_HOME environment variable.
# echo "export JAVA_HOME=/usr/java/jdk-11.0.1" >> /etc/profile # export JAVA_HOME=/usr/java/jdk-11.0.1
Verify installation of Java JDK 11 by executing java command.
# java -version java version "11.0.1" 2018-10-16 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)
Java JDK 11 has been installed from RPM Package on CentOS 7 server.
Connect to java-server.example.com using ssh as root user.
Download Java JDK 11 TAR for CentOS 7 from Oracle Technical Network (OTN) and copy it to the home directory of root user.
Extract downloaded tarball using tar command.
# mkdir /usr/java # tar xf jdk-11.0.1_linux-x64_bin.tar.gz -C /usr/java/ # ls /usr/java/ jdk-11.0.1
Set JAVA_HOME environment variable.
# echo "export JAVA_HOME=/usr/java/jdk-11.0.1" >> /etc/profile # export JAVA_HOME=/usr/java/jdk-11.0.1
Create the symbolic link for java using alternatives command.
# alternatives --install /usr/bin/java java /usr/java/jdk-11.0.1/bin/java 2 # alternatives --config java There is 1 program that provides 'java'. Selection Command ----------------------------------------------- *+ 1 /usr/java/jdk-11.0.1/bin/java Enter to keep the current selection[+], or type selection number:
We have only one JDK/JRE installed on this server, therefore, press <ENTER> to keep the current selection.
Create the symbolic link for javac using alternatives command.
# alternatives --install /usr/bin/javac javac /usr/java/jdk-11.0.1/bin/javac 2 # alternatives --config javac There is 1 program that provides 'javac'. Selection Command ----------------------------------------------- *+ 1 /usr/java/jdk-11.0.1/bin/javac Enter to keep the current selection[+], or type selection number:
Press <ENTER>.
Create the symbolic link for jar using alternatives command.
# alternatives --install /usr/bin/jar jar /usr/java/jdk-11.0.1/bin/jar 2 # alternatives --config jar There is 1 program that provides 'jar'. Selection Command ----------------------------------------------- *+ 1 /usr/java/jdk-11.0.1/bin/jar Enter to keep the current selection[+], or type selection number:
Press <ENTER>
Verify installation of Java JDK 11 by executing java command.
# java -version java version "11.0.1" 2018-10-16 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)
Java JDK 11 has been installed from TAR on CentOS 7 server.
If you are new to Linux and facing difficulty in working at Linux Bash prompt. We recommend that, you should read The Linux Command Line, 2nd Edition: A Complete Introduction by William Shotts.
Installing Java on CentOS 7 is a crucial step for running Java applications and developing Java programs. By following this guide, you should have a fully functional Java Development Kit (JDK) and Java Runtime Environment (JRE) set up on your system.
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