大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				class CompareToTest extends GroovyTestCase {								    void testCompareTo() {								        def a = 12				        def b = 20				        def c = 30				        				        def result = a  b				        assert result < 0								        result = a  12				        assert result == 0								        result = c  b				        assert result > 0				        				        assert (a  b) < 0				        assert a  12 == 0				        assert (c  b) > 0				    }								    void testNullCompares() {				    				    	def a = 123				    	def b = null				    					    	def result = a  b				    	assert result > 0				    					    	result = b  a				    	assert result < 0				    					    	result = b  null				    	assert result == 0				    }				}