yossale

//Every closure in groovy is executable, and technically, implements the "Callable" interface
def a = { println "hello!"}
a()
// --> hello
a.call()
// --> hello

yossale

def messageTo =  { num ->
    println(Thread.currentThread().name + " --> A message for you number $num")
}

def pool = Executors.newFixedThreadPool(10)
(1..1000).each { num ->
    pool.submit({ messageTo(num) })
}

pool.awaitTermination(60, TimeUnit.SECONDS)

yossale

class Fish (var fishName: String){

  private var myName = fishName
  def name = myName
  def name_= (newName: String) = myName = newName
  def sayHello(otherFish : Fish) = println ("hello, " + otherFish.myName) 

}

yossale

class Fish {
     
   private var name = "Default"
   def getName = name
   def setName(newName: String) = name = newName
     
}

yossale

class Fish {

  private var myName = "Default"
  def name = myName
  def name_= (newName: String) = myName = newName

}