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#1 feat: add Java setup

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dancingCycle 2022-02-16 14:07:40 +01:00
parent 562f94e563
commit 6bcfd71f60
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README.md
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@ -19,9 +19,9 @@ Documentation for artitrary setups
* [Setup Password Manager](doc/setup-pwd-mgmt.md)
* [Create Group and User](doc/create-grp-usr.md)
* [Setup Emacs](doc/setup-emacs.md)
* [Setup Java](doc/setup-java.md)
* To-do List
* gitk
* Java
* Maven
* Reuse
* IDE

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doc/setup-java.md Normal file
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# Setup Java
* download OpenJDK from the [Eclipse Foundation](https://adoptium.net/)
* extract JDK to target folder
```
sudo tar -xvzf ./OpenJDK17U-jdk_x64_linux_hotspot_17.0.2_8.tar.gz -C /usr/lib/jvm/open-jdk-17 --strip-components=1
sudo tar -xvzf ./OpenJDK11U-jdk_x64_linux_hotspot_11.0.14.1_1.tar.gz -C /usr/lib/jvm/open-jdk-11/ --strip-components=1
```
* check if any JDK is already installed
```
update-alternatives --list java
```
* install JDK 17
```
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/open-jdk-17/bin/java 1
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/open-jdk-17/bin/javac 1
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/open-jdk-17/bin/jar 1
sudo update-alternatives --install /usr/bin/jshell jshell /usr/lib/jvm/open-jdk-17/bin/jshell 1
```
* install JDK 11
```
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/open-jdk-11/bin/java 2
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/open-jdk-11/bin/javac 2
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/open-jdk-11/bin/jar 2
sudo update-alternatives --install /usr/bin/jshell jshell /usr/lib/jvm/open-jdk-11/bin/jshell 2
```
* chose JDK version
```
sudo update-alternatives --config java
```
* verify installation and configuratin
```
java -version
javac -version
jar --version
jshell -version
sudo update-alternatives --display java
```