install openjdk 8 sdk on ubuntu
sudo apt-get install openjdk-8-jdkinstall openjdk 8 sdk on ubuntu
sudo apt-get install openjdk-8-jdkset default java version
# on linux
sudo update-alternatives --config java
# then just input the number of the jdk you
# want to use as default and hit EnterCopyright © 2021 Codeinu
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