Question

I have a Java application that does something like:

public class MyApplication {
    public static int main(String[] args) {
      System.out.println(System.getProperty("my.property"));
    }
}

How do I call this from Groovy such that the Groovy script sets the System property?

Answer 1

You can call Java with the -D command line parameter:

def output = "java -Dmy.property=foo MyApplication".execute().text

Alternatively, you can call the Java class from within your script without starting a new Java process:

System.properties['my.property'] = 'foo'
MyApplication.main([] as String[])