Check if true

Question

Please chech wether these java statments are or not. If not please give reasons
St 1
whenever an object of that class is created, the attribute attribute will be set to same.
St 2
You have to give vlaue to each attribute of object
St 3
Constructors give value to attribute of object of created class
St 4
The setter methods inside the constructors can be used to set the attribute values
St 5
You can not set objects when you use constructors (specail methods)

Answer 1

I'm telling with the OOP perspective. There might be some exception in Java.

St1. Attribute will be set to their default values. If we don't write constructor compiller will automatically write it. If we have written constructor, it will use give values to initialize object.

Answer 2

St2. No. They can be default. But having a attribute which you don't use anywhere is a bad practice but still it is not an syntax error.

Answer 3

St3. False.

Class is just structure. It cannot be created and distroyed ...

Objects are created from the class.

Constructor is used to construct the object. It first create object then assign values to its attributes.
If you want to initialize its variables (Attribute) use the initializer list.

Answer 4

St4. Yes. Because constructor first create object then assign values.

Therefore all the methods of that object can be called on it. Even inside constructor.

Just consider the order in which you use them specially if you are using some method which use some other attribute. You have to first assign that attribute value.

Otherwise it will lead to logical error

Answer 5

St5. I don't get this one...

Please explain more

Answer 6

Thanks C ++