Stack on Groovy ;)

gistfile1.groovy

input = args[0] as Integer
top = -1
stack = new long[input]
def push(long j)
{
		stack.putAt(++top,j)
}
def pop()
{
	stack.getAt(top--)
}
boolean isEmpty()
{
	top == -1
}
boolean isFull()
{
	top == input -1
}
println '''
			pushing the elements into the stack
			***********************************
		'''
(3..9).each { elements ->
	if(isFull())
		println "Sorry the stack is full"
	else
	{
		push elements
		println "successfull added the element, $elements into the stack"
	}
}
println '''
			Now poping the elements out
			*****************************
		'''
(3..9).each {
		if(!isEmpty())
			pop()
		else
			println "sorry stack is alreay empty"
}