I found a solution
I installed epirus wrapper, then I generated java package with command epirus solidity generate
-a=/root/my_json.abi -o=/root/ -p=my_java
(before I changed extension of my file from json to abi). After getting this package, I could use smart contract object with his methods from json file.
Also, after installation of epirus and before generating package I used this commands
JAVA_HOME=$(dirname $( readlink -f $(which java) )) JAVA_HOME=$(realpath "$JAVA_HOME"/../) export JAVA_HOME
sudo update-alternatives --config java
Don`t know exactly what they do, but without them I could not use epirus.
To check if epirus ready to generate I used command
It returns version of wrapper. If not - use two commands above.
Ismael, thank you for the direction)