大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				class LeftShiftTest extends GroovyTestCase {								    def foo = [1, 2, 3]								    void testShift() {				        def x = 4								        def y = x 								        println "Value is $y"								        assert y == 16								        assert x 				    }								    void testShiftList() {				        def list = []								        for (i in 1..10) {				            list 				        }								        println "List is $list"				    }								    void testLeftShiftOnExpression() {				        this.foo 								        assert foo == [1, 2, 3, 4]				    }								}