OO Hello World - Groovy

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The Hello World version of the program in Groovy! A dynamic language for the JVM runtime with a very Java-like syntax.

By the way, you can see my previous post here: http://carlosqt.blogspot.com/2010/06/oo-hello-world.html
where I give some details on WHY these "OO Hello World series" samples.


Version 1 (Minimal):

The minimum you need to type to get your program compiled and running.

class Greet {
  def name
  Greet(name) { 
      this.name = name[0].toUpperCase() + name[1..-1]
  }
  def salute() { 
      println "Hello $name!"
  }
}

// Greet the world! 
g = new Greet('world')  
g.salute()

Version 2 (Verbose):

Explicitly adding instructions and keywords that are optional to the compiler.

package GreetProgram

private class Greet {
  private def name
  public def Greet(name) { 
      this.name = name[0].toUpperCase() + name[1..-1]
  }
  public def salute() { 
      println "Hello $name!"
  }
}

// Greet the world! 
g = new Greet('world')  
g.salute()

The Program Output:

Groovy Info:

“Groovy is an object-oriented programming language for the Java platform. It is a dynamic language with features similar to those of Python, Ruby, Perl, and Smalltalk. It can be used as a scripting language for the Java Platform.

Groovy uses a Java-like bracket syntax. It is dynamically compiled to Java Virtual Machine bytecode and interoperates with other Java code and libraries. Most Java code is also syntactically valid Groovy.” Taken from: (http://en.wikipedia.org/wiki/Groovy_(programming_language))

Appeared:	2003
Current Version:	1.7.5 and 1.8 Beta 2  (latest version in "Languages" page)
Developed by:	Guillaume Laforge
Creator:	Guillaume Laforge
Influenced by:	Java (James Gosling)
Predecessor Language
Predecessor Appeared
Predecessor Creator
Runtime Target:	JVM
Latest Framework Target:	JDK 6
Mono Target:	No
Allows Unmanaged Code:	No
Source Code Extension:	“.groovy”
Keywords:	57
Case Sensitive:	Yes
Free Version Available:	Yes
Open Source:	Yes
Standard:	JSR 241
Latest IDE Support:	NetBeans http://netbeans.org/downloads/index.html Eclipse http://www.eclipse.org/downloads/ IntelliJ IDEA http://www.jetbrains.com/idea/download/index.html
Language Reference:	http://groovy.codehaus.org/Documentation
Extra Info:	http://en.wikipedia.org/wiki/Groovy_(programming_language) http://groovy.codehaus.org/Documentation