Some ideas:

On 2023-02-22, Saurav writes: I have optimized the MacOS script for running
and testing our Blockchain program. Save the below code snippet in ".scpt"
file extension and place it in the same directory as your "Blockchain.java"
file along with the Gson jar. To execute the script, open it using the Apple
script editor and execute it through "run" button provided in the
dialog. Please let me know if there is any problem while running this
script.

--Start Script
set processcount to 3 --Set process count as required (Default set to 3)
tell application "Finder"
    --Fetching the current path
    set currentPath to (do shell script "dirname " & quoted form of (POSIX path of (path to me) as string)) as string
    tell application "Terminal"
        if not (exists window 0) then reopen
        activate
        set targetWindow to 0
        do script "cd " & currentPath in window 0 --Setting path to current path
        do script "javac -cp \"gson-2.8.2.jar\" *.java" in window 0 --Compiling Blockchain
        do script "java -cp \".:gson-2.8.2.jar\" Blockchain 0" in window 0 --Executing Blockchain first process as argument "0"
    delay 1
        repeat with counter from 1 to (processcount-1) --Looping through the counter and opening different terminal each
        repeat with counter from 1 to (processcount-1) --Looping through the counter and opening different terminal each for given count
	do script "cd " & currentPath
            delay 0.5
            do script "java -cp \".:gson-2.8.2.jar\" Blockchain "&counter in front window
    delay 1
	 end repeat
	end tell
    end tell
--End Script

------------

In Windows, the ".;gson..." part is valid. In Unix systems, this needs to be
".:gson..." with a colon, and not a semicolon. -- Thanks Kyle!

Thanks David Maciulis!:

I figured out a very easy way of starting multiple java programs using
AppleScript.

1) Create a text file that has .scpt extension --> myScript.scpt

2) Copy/paste the script below (don't forget to change the path)

3) Run the script in terminal --> osascript myScript.scpt

If anyone has any ideas how to improve the script below, please let me know.

Script:

tell application "Terminal.app"
    activate
    set targetWindow to 0
    do script "cd
    /Users/davidmaciulis/DePaul/DistributedSystems/Assignments/Blockchain/
    && java bc 0"

    tell application "System Events" to keystroke "t" using command down
    do script "cd
    /Users/davidmaciulis/DePaul/DistributedSystems/Assignments/Blockchain/
    && java bc 1" in window 0


    delay 0.3
    tell application "System Events" to keystroke "t" using command down
    do script "cd
    /Users/davidmaciulis/DePaul/DistributedSystems/Assignments/Blockchain/
    && java bc 2" in window 0
end tell

Another script. Thanks Chadwick!

If the new tab isn't in the correct directory then just re-add 
"cd /your/directory/here/" before the java command to solve that. 

//start script

tell application "Terminal"

   activate

   set targetWindow to 0

   do script "cd
   /Users/Chad/Documents/DePaul/CSC435/assignments/Blockchain/" in window 0

   do script "javac -cp \"gson-2.8.2.jar\" *.java" in window 0

   do script "java -cp \".:gson-2.8.2.jar\" Blockchain 0

" in window 0

   delay 0.3

   tell application "System Events" to keystroke "t" using command down

   do script "

java -cp \".:gson-2.8.2.jar\" Blockchain 1

" in front window

   delay 0.3

   tell application "System Events" to keystroke "t" using command down

   do script "

java -cp \".:gson-2.8.2.jar\" Blockchain 2

" in front window

end tell

//end script

If you have any questions or suggestions, feel free to reach out! 

EDIT: I edited the command for running to include

".:gson-2.8.2.jar\" as it is required

Thanks Kaz!

I figured out a super clunky way of getting [Multiple Scripts] going [on Mac].  Hopefully it helps
someone else - I'm sure there are lots of ways of improving this, but here's
what I came up with.  The path to my Blockchain.java file is
"Desktop/'CSC_435'/Blockchain", so you can change that depending on what
your folder structure looks like

osascript <
				--java.xml.bind Blockchain 0"
end tell

tell app "Terminal"
do script "cd Desktop/'CSC 435'/Blockchain && java --add-modules -->
				--java.xml.bind Blockchain 1"
end tell

tell app "Terminal"
do script "cd Desktop/'CSC 435'/Blockchain && java --add-modules -->
				--java.xml.bind Blockchain 2"
end tell
EOF

Thanks Randy:

2018-02-11

I started searching around on iTerm's website and found a scripting
reference page.

https://www.iterm2.com/documentation-scripting.html

After creating a new profile called BlockChain to direct the new terminals
to the correct working directory in iTerm I used the following script that
will get all 3 processes running in separate windows and it works like the
demo in class.

Save the below into scriptName.scpt

tell application "iTerm2"
create window with profile "BlockChain" command "java bc 0"
create window with profile "BlockChain" command "java bc 1"
create window with profile "BlockChain" command "java bc 2"
end tell

You can then run > osascript scriptName.scpt

This isn't pretty, but it works for the demo code and I think with some
small tweaks should work for the assignment.

and 

Thanks Matt:

2018-02-11

Another solution...not pretty but functional

Copy below to allbat.sh

run chmod 700 on allbat.sh 

run ./allbat.sh at command line

#!/bin/sh

osascript <