Problems with installation of jstock

I am using LMDE 4 and I tried to install jstock as followed

Code:cd ~
wget https://github.com/yccheok/jstock/releases/download/release_1-0-7-44/jstock-1.0.7.44-bin.zip
unzip jstock-1.0.7.44-bin.zip
cd jstock/
chmod 755 jstock.sh
./jstock.shthat worked
then I checked if java is already installed

Code:madmax@travelmate:~$ java -version
openjdk version "11.0.6" 2020-01-14
OpenJDK Runtime Environment (build 11.0.6+10-post-Debian-1deb10u1)
OpenJDK Server VM (build 11.0.6+10-post-Debian-1deb10u1, mixed mode, sharing)
madmax@travelmate:~$seems that it s installed
But i only get jstock running via terminal

Code:madmax@travelmate:~$ cd jstock/
madmax@travelmate:~/jstock$
madmax@travelmate:~/jstock$ ./jstock.sh
Warning: /bin/java does not exist
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.thoughtworks.xstream.core.util.Fields (file:/home/madmax/jstock/lib/xstream-1.4.11.1.jar) to field java.util.TreeMap.comparator
WARNING: Please consider reporting this to the maintainers of com.thoughtworks.xstream.core.util.Fields
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Security framework of XStream not initialized, XStream is probably vulnerable.
Security framework of XStream not initialized, XStream is probably vulnerable.
Security framework of XStream not initialized, XStream is probably vulnerable.
Security framework of XStream not initialized, XStream is probably vulnerable.
Security framework of XStream not initialized, XStream is probably vulnerable.and I miss the entry in the menu. When I close the terminal, jstock will disappear.Any help will be appreciated