大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				import java.util.Date								class DateTest extends GroovyTestCase {				  				    void testNextPrevious() {				        def x = new Date()				        def y = x + 2				        				        assert x < y				        ++x				        --y				        				        assert x == y				        x += 2				        assert x > y				        				        println "have dates ${x} and ${y}"				    }				    				    void testDateRange() {				        				        def today = new Date()				        def later = today + 3				        				        def expected = [today, today + 1, today + 2, today + 3]				        				        def list = []				        for (d in today..later) {				            list 				        }				        assert list == expected				    }				}