Java is a computer language that gives programmers the ability to build reliable, efficient programs. A Java compiler converts a Java program’s source code to create bytecode specific to that source code. The java command is used to compile a Java program’s source code. By using the aforementioned techniques, you can quickly develop, compile, and run a Java program from the command line. The Java Runtime Environment must be installed in order to run Java programs, and your Linux distribution’s official package manager can help with this. Keep reading to How To Check Java Version In Linux Command Line?
The methods listed below can be used to determine what version of Java is installed on your Linux system.
It should be noted that the techniques employed here are compatible with the linux version listed below:
- debian
- ubuntu
- fedora
- linux mint
- red hat
There are two ways to determine whether a version of Java is installed on your Linux system:
Using the java -version command line, check the Java version.
Linux is just one of the many platforms that may be utilised with the Java programming language. To find out what version of Java is installed on your system, use the check Java version command line in Linux. This can be helpful for debugging or for making sure your applications are running on the right Java version.
“The user must have root access or sudo rights in order to check the Java version in their Linux system.”
The root account is not set up by default in Ubuntu Linux. Users must manually configure the root account password in order to utilise “sudo” if they desire one. In general, using sudo is an excellent technique to prevent the user’s machine from being used as an exploitable tool.
Any time a user tries to add, uninstall, or modify any piece of software, they need root rights to do it. After entering a user password to provide system-based access, the user executes the sudo command to obtain these permissions for any specific command they wish to perform.
How to get sudo access
1. Use a root user account or a user account with sudo rights to log into the system.
2. With the command: launch a terminal window, add a new user.
The adduser command creates a new user, together with that user’s home directory and group.
You might get a notice saying that your privileges are insufficient. (This only generally occurs for non-root users.) Enter to circumvent it:
sudo adduser newuser
3. You can replace newuser
any username you choose. After adding the new user, the system will ask you to enter a password. Make your password strong and safe, then retype it to be sure.
4. You will be prompted by the system to enter further user-specific data. Name, phone numbers, and other data are included here; you can omit them by pressing Enter.
Check the Java version that was used.
Open a command line terminal, and then type the following command to see what version of Java is currently installed on your Linux system:
java -version
The Java version number will be shown if Java is installed on the computer.
Open a command line terminal, and then type the following command to see what version of Java is currently installed on your Linux system:
java -version
The Java version number will be shown if Java is installed on the computer.
By looking at the location of Java’s installation
On a Linux system, there are a few ways to check the Java version. Checking the location of Java’s installation is one method.
way in Linux to the area of Windows where you can discover the Java
Opening a terminal window is the first action to take. Then, enter the subsequent command to discover where Java is set up on your computer:
which java
The response will be a path, such /usr/bin/java.
How to update your linux to the newest version of java:
JAR files are frequently used to distribute AVA applications. Your system might already be set up to run a Java program, in which case you can just double-click the application icon (or choose it from an application menu) to start it. This depends on how Java was installed on your computer. You can start Java programs from a terminal if you had to install Java locally and it wasn’t integrated with the rest of your system:
$ java -jar ~/bin/example.jar &
If you’re a developer who has to make the decision, think about the components you require. If you choose Oracle’s version, be aware that the package contains proprietary plugins and fonts that may prevent your program from being distributed. It is most secure to develop with OpenJDK or IcedTea.
Conclusion
One of the few programming environments is Java, which prioritises cross-platform development. There is nothing more emancipating than finding out a program was created in Java after checking to see if it runs on your platform.
Simply said, whether you’re a user or a developer, you’re no longer plagued by platform anxiety. Run Java programs on each of your workstations and embrace Java applications.
