大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				class MinusEqualsTest extends GroovyTestCase {								    void testIntegerMinusEquals() {				        def x = 4				        def y = 2				        x -= y				        				        assert x == 2				        				        y -= 1				        				        assert y == 1				    }								    void testCharacterMinusEquals() {				        Character x = 4				        Character y = 2				        x -= y				        				        assert x == 2				        				        y -= 1				        				        assert y == 1				    }				    				    void testNumberMinusEquals() {				        def x = 4.2				        def y = 2				        x -= y				        				        assert x == 2.2				        				        y -= 0.1				        				        assert y == 1.9				    }				    				    void testStringMinusEquals() {				        def foo = "nice cheese"				        foo -= "cheese"				        				        assert foo == "nice "				    }				}