linux mint install jdk 15

 I have been using linux mint 20.1 and I needed to install java 15 but when I search I could not find proper commands, here they are

sudo apt-get install wget apt-transport-https gnupg wget -qO - https://adoptopenjdk.jfrog.io/adoptopenjdk/api/gpg/key/public | sudo apt-key add - echo "deb https://adoptopenjdk.jfrog.io/adoptopenjdk/deb focal main" | sudo tee /etc/apt/sources.list.d/adoptopenjdk.list sudo apt-get update sudo apt-cache search adoptopenjdk sudo apt install adoptopenjdk-15-hotspot  

adoptopenjdk is openjdk delivery system, details in case for different linux versions redhat or opensuse check

last year I decided to start answering in stack overflow

not going bad so far.