Install Oracle Java 13 (JDK 13) on Debian, Ubuntu, Linux Mint, Pop!_OS

jdk.ssh

Downloading and setting the path of JAVA.
sudo apt install default-jre     
sudo apt install default-jdk            
java -version
javac -version
sudo nano /etc/profile
sudo nano ~/.bashrc

JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JRE_HOME
export PATH


sudo reboot

Downloading and setting the path of Android SDK.
https://developer.android.com/studio#downloads

Extract android-studio-ide-193.6626763-linux.tar.gz
cd android-studio/bin && sudo bash sudo bash studio.sh


Installing Flutter in Linux and setting the path.

https://medium.com/@charinin/setting-java-home-environment-variable-in-ubuntu-e355c80e5b6c
https://www.oracle.com/java/technologies/javase-jdk14-downloads.html
https://medium.com/@charinin/setting-java-home-environment-variable-in-ubuntu-e355c80e5b6c
Solving the flutter run issues.