mirror of
https://github.com/LCTT/TranslateProject.git
synced 2025-01-07 22:11:09 +08:00
103 lines
4.0 KiB
Markdown
103 lines
4.0 KiB
Markdown
[#]: subject: "How to Install Java on Fedora Linux"
|
||
[#]: via: "https://itsfoss.com/install-java-fedora/"
|
||
[#]: author: "Abhishek Prakash https://itsfoss.com/author/abhishek/"
|
||
[#]: collector: "lujun9972"
|
||
[#]: translator: "geekpi"
|
||
[#]: reviewer: " "
|
||
[#]: publisher: " "
|
||
[#]: url: " "
|
||
|
||
How to Install Java on Fedora Linux
|
||
======
|
||
|
||
Love it or hate it, it is difficult to avoid Java.
|
||
|
||
Java is still a very popular programming language taught in the schools and used in the enterprises.
|
||
|
||
If you want to use a Java-based tool or program in Java, you’ll need to have Java on your system.
|
||
|
||
This becomes confusing because there are so many technical terms around java.
|
||
|
||
* Java Development Kit (JDK) for creating Java programs
|
||
* Java Runtime Environment (JRE) or Java Virtual Machine (JVM) for running Java programs
|
||
|
||
|
||
|
||
On top of that, you’ll come across [OpenJDK][1] and [Oracle Java SE][2]. OpenJDK is what is recommended because it is open source. If you have exclusive need then only you should go for Oracle Java SE.
|
||
|
||
There is one more thing here. Even OpenJDK has several versions available. At the time of writing this article, Fedora 34 has OpenJDK 1.8, OpenJDK 11 and OpenJDK 16 available.
|
||
|
||
It is up to you to decide which Java version you want.
|
||
|
||
### Installing Java on Fedora Linux
|
||
|
||
First thing first, check if Java is already installed and which version it is. I am not kidding. Fedora usually comes with Java preinstalled.
|
||
|
||
To check, use the following command:
|
||
|
||
```
|
||
java -version
|
||
```
|
||
|
||
As you can see in the screenshot below, I have Java 11 (OpenJDK 11) installed on my Fedora system.
|
||
|
||
![Check Java version][3]
|
||
|
||
Let’s say you want to install another version of Java. You may check the available options with the following command:
|
||
|
||
```
|
||
sudo dnf search openjdk
|
||
```
|
||
|
||
The sudo here is not required but it will refresh the metadata for sudo user which will eventually help when you install another version of Java.
|
||
|
||
The above command will show a huge output with plenty of similar looking packages. You have to focus on the initial few words to understand the different versions available.
|
||
|
||
![Available Java versions in Fedora][4]
|
||
|
||
For example, to install Java 8 (OpenJDK 1.8), the package name should be java-1.8.0-openjdk.x86_64 or java-1.8.0-openjdk. Use it to install it:
|
||
|
||
```
|
||
sudo dnf install java-1.8.0-openjdk.x86_64
|
||
```
|
||
|
||
![Install Java Fedora][5]
|
||
|
||
That’s good. Now you have both Java 11 and Java 8 installed on your system. But how will you use one of them?
|
||
|
||
#### Switch Java version on Fedora
|
||
|
||
Your Java version in use remains the same unless you explicitly change it. Use this command to list the installed Java versions on your system:
|
||
|
||
```
|
||
sudo alternatives --config java
|
||
```
|
||
|
||
You’ll notice a number before the Java versions. The + sign before the Java versions indicate the current Java version in use.
|
||
|
||
You can specify the number to switch the Java version. So, in the example below, if I enter 2, it will change the Java version on the system from Java 11 to Java 8.
|
||
|
||
![Switching between installed Java versions][6]
|
||
|
||
That’s all you need to do for installing Java on Fedora.
|
||
|
||
--------------------------------------------------------------------------------
|
||
|
||
via: https://itsfoss.com/install-java-fedora/
|
||
|
||
作者：[Abhishek Prakash][a]
|
||
选题：[lujun9972][b]
|
||
译者：[译者ID](https://github.com/译者ID)
|
||
校对：[校对者ID](https://github.com/校对者ID)
|
||
|
||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
|
||
|
||
[a]: https://itsfoss.com/author/abhishek/
|
||
[b]: https://github.com/lujun9972
|
||
[1]: https://openjdk.java.net/
|
||
[2]: https://www.oracle.com/java/technologies/javase-downloads.html
|
||
[3]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2021/08/check-java-version-fedora.png?resize=800%2C271&ssl=1
|
||
[4]: https://itsfoss.com/wp-content/uploads/2021/08/available-java-versions-fedora-800x366.webp
|
||
[5]: https://i0.wp.com/itsfoss.com/wp-content/uploads/2021/08/install-java-fedora.png?resize=800%2C366&ssl=1
|
||
[6]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2021/08/switch-java-versions-fedora.png?resize=800%2C513&ssl=1
|