Get output from Bash in Java?

I have this this Java code that works:

public class GetNumberOfFiles {
    protected long GetNumberOfFilesMethod(String folder){
        try {
            Process p = Runtime.getRuntime().exec(new String[]{"bash", "-c", "cd " + folder + "&& find . -type f | grep :*.txt "});
            BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
            return stdInput.lines().count();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }

    }
}

I created also this code with similar logic, but after a few tries I put the bash code into a separate file.

The Java code:

protected String CheckUserMethod(String user){
        try {

            Process p = Runtime.getRuntime().exec(new String[]{"bash", "-c", "~/Final-Year/src/query", "&& ./checkuser.sh", user});
            BufferedReader srdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
            String a = null;
            while ((a = srdInput.readLine()) != null)
            {
                System.out.println(a);
            }

            return a;
        }catch (Exception e){
            throw new RuntimeException(e);
        }
    }

The bash code is:

#!/bin/bash

# shellcheck disable=SC2237
if ! [ -z "$1" ]
then
  echo "$1"
  cd ~/Final-Year/maps/ && find "$1" -maxdepth 0 -type d -printf 1
fi

The code is working perfectly when I am executing from terminal as it is in this example:

The problem is,when I am executing the code from Java is not even executing the bash file. Do you have any suggestion?