大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				class PrefixTest extends GroovyTestCase {								    void testIntegerPrefix() {				        def x = 1				        				        def y = ++x				        				        assert y == 2				        assert x == 2				        				        assert ++x == 3				    }				    				    void testDoublePrefix() {				        def x = 1.2				        def y = ++x				        				        assert y == 2.2				        assert x == 2.2				        assert ++x == 3.2				        assert x == 3.2				    }								    void testStringPrefix() {				        def x = "bbc"				        ++x				        				        assert x == "bbd"				        				        --x				        --x				        				        assert x == "bbb"				    }				}