executing a jar file through a bash script

Question

I want to execute a jar file using java -jar command from a bash script. At the same time I'm passing few parameters which I can access in my main method, using args[].

I'm able to do this without any issues if I try,

java -jar org.sample.jar localhost 8080

but I want to make these parameters configurable through few variables.

Eg:-

HOST=localhost
PORT=8080

When I try to use above variables like following, bash script fails silently.

java -jar org.sample.jar $HOST $PORT

I also tried using "$HOST" but without any luck. What am I doing wrong here?

UPDATE

I was using cygwin to execute/debug my bash script. Once I execute the same script using git bash it works.

Answer 1

You should wrap this in a bash scripts and using bash parameters.

Say you will have a script file sample.sh.

in sample.sh, it contains only one line, which is java -jar org.sample.jar "$@"

Then execute your jar file by bash sample.sh -Host hostname -port 8080

Here is a post about how to do this.

UPDATE

To use variables in your bash script, your script will look like this:

Host="localhost"
Port=8080

java -jar org.sample.jar $Host $Port

I'm using Eclipse and I only wrote one class which has a main method and prints all the arguments. Then I used Eclipse to export a jar file and then used this solution and it worked.