Running Groovy on the Command Line
Of course, for some programmers nothing can give as much pleasure as getting into the command line and running the program from there. We can do that by typing the command groovy followed by the Groovy program filename, as shown next.
| | > cat Hello.groovy |
| | println "Hello Groovy!" |
| | > groovy Hello |
| | Hello Groovy! |
| | > |
To try a couple of statements directly on the command line, use the -e option. Type groovy -e "println ’hello’" on the command line, and press Enter/Return. Groovy will output “hello.”
Realistically, though, the groovy command is useful for executing large Groovy scripts and classes. It expects us to either have some executable code outside any class, or have a class with a static main(String[] ...
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