Dart语言对象

class Student { 
   void test_method() { 
      print("This is a  test method"); 
   } 

   void test_method1() { 
      print("This is a  test method1"); 
   } 
}  
void main()    { 
   Student s1 = new Student(); 
   s1.test_method(); 
   s1.test_method1(); 
}