Æsh can also be set up to run just one command. It will try to parse all the parameters as normal and execute the one command specified.

In this example we've created a simple command RuntimeCommand where we have defined two options: inputand bar. If input is provided as a parameter, the command will query the user for an answer, else it will try to display the value of the input parameter bar.

To compile and run you need

• JDK 8 or later
• Apache Maven 3.5.+

Launch the Maven build with:

mvn install

For simplicity we use the Maven shade plugin to package all the dependencies into on jar, to run:

java -jar target/getting-started-runtime-0.1.jar --input or java -jar target/getting-started-runtime-0.1.jar --bar Foo