| Constructor is used for initializing the object state. | Method is used for exposing the object's behavior. |
| Constructor has no return type. | Method should have a return type. Even if it does not return anything, return type is void. |
| Constructor gets invoked implicitly. | Method has to be invoked on the object explicitly. |
| If the constructor is not defined, then a default constructor is provided by the java COMPILER. | If a method is not defined, then the compiler does not provide it. |
| The constructor name should be equal to the CLASS name. | The name of the method can have any name or have a class name too. |
| A constructor cannot be marked as final because whenever a class is inherited, the constructors are not inherited. Hence, marking it final doesn't make sense. Java throws compilation error saying - MODIFIER final not allowed here | A method can be defined as final but it cannot be overridden in its subclasses. |
| Final variable instantiations are possible INSIDE a constructor and the scope of this applies to the whole class and its objects. | A final variable if initialised inside a method ensures that the variable cant be changed only within the scope of that method. |
