Groovy, Java\'s New Scripting Language
When some Java developers hear about Groovy, their first reaction often is, as mine was, "Oh, no, not another scripting language for Java." We already have, after all, JavaScript and Rhino, Jython, Jelly, BeanShell,
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Why Groovy?
Why would Bob McWhirter and James Strachan create a new scripting language? Why would they call it Groovy? More importantly, what features would enable Groovy to succeed when others are already entrenched? Let's answer the third question with a look at Groovy's features.
When scripting languages that started elsewhere come to Java, they tend to bring a lot of their own API with them rather than using the "standard" (to us) Java API. Groovy is not guilty here--it provides very little special-purpose API; the entirety of the standard Java API is given to you in Groovy as it is in Java, and any third-party Java can be made available just by putting it in your CLASSPATH.
Why Use Groovy?
So, it's groovy that Groovy doesn't suffer from the problems above, but what is it actually good for? Well, any kind of scripting, really. People are starting to use it for prototyping; that is, get an algorithm working in Groovy, then convert it to Java. But often you can just write something in Groovy and keep it as a Groovy script. Just to give you one example, see the fixid.groovy example below, a script I wrote to ensure that all of the Java files in a project have a CVS ID string.
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