大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				package gls.scope								import gls.scope.CompilableTestSupport								public class MultipleDefinitionOfSameVariableTest extends CompilableTestSupport {								   public void testInSameBlock() {				     shouldNotCompile("""				       def foo = 1				       def foo = 2				     """)				      				     shouldNotCompile("""				       class Foo {				         def foo() {				           def bar=1				           def bar=2				         }				       }				     """)				   }				   				   public void testInSubblocks() {				     shouldNotCompile("""				       def foo = 1				       5.times { def foo=2 }				     """)				     				     shouldNotCompile("""				       def foo = 1				       label1: { def foo=2 }				     """)				     				     shouldNotCompile("""				       def foo = 1				       for (i in []) { def foo=2 }				     """)				     				     shouldNotCompile("""				       def foo = 1				       while (true) { def foo=2 }				     """)     				   } 				   				   public void testInNestedClosure() {				     shouldNotCompile("""				       def foo = 1				       5.times { 6.times {def foo=2 }				     """)				     				     assertScript ("""				       def foo = 1				       5.times { 6.times {foo=2 } }				       assert foo == 2				     """)				   }				   				   public void testBindingHiding() {				     assertScript("""				       foo = 1				       def foo = 3				       assert foo==3				       assert this.foo == 1				       assert binding.foo == 1				     """)				   }				   				   public void testBindingAccessInMethod() {					   assertScript("""					     def methodUsingBinding() {					       try {					         s = "  bbb  ";					       } finally {					         s = s.trim();					       }					       assert s == "bbb"					     } 					     methodUsingBinding()					     assert s == "bbb"					   """)				   }				   				   public void testMultipleOfSameName() {				   		shouldNotCompile("""				   		  class DoubleField {							def zero = 0							public zero = 0						  }						  				   		""")				   				   		shouldNotCompile("""				   		  class DoubleField {							def zero = 0							def zero = 0						  }						  				   		""")								   }				   				   				}