Java帝国的王储——Groovy !

import org.apache.commons.lang.WordUtils

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

class Greeter extends Greet {
Greeter(who) { name = WordUtils.capitalize(who) }
}

new Greeter('world').salute()