Java not insalled after "sudo apt-get install openjdk-8-jre / sudo apt-get install openjdk-8-jdk"

I am getting the follwoing error message:

Command 'java' not found, but can be installed with:
sudo apt install default-jre # version 2:1.11-72, or
sudo apt install openjdk-11-jre-headless # version 11.0.15+10-0ubuntu0.20.04.1
sudo apt install openjdk-13-jre-headless # version 13.0.7+5-0ubuntu1~20.04
sudo apt install openjdk-16-jre-headless # version 16.0.1+9-1~20.04
sudo apt install openjdk-17-jre-headless # version 17.0.3+7-0ubuntu0.20.04.1
sudo apt install openjdk-8-jre-headless # version 8u312-b07-0ubuntu1~20.04

How do i install it correctly?

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