Constructors

[Hama Kamal]

hi guys,,

in the SCJP6 book ,,,( by katy and bert ) >>>>page 133 >> rules for constructors:
i dont get the following two points could any one expalin it more with giving simple illustrating example for each!

1-Only static variables and methods can be accessed as part of the call to super()
or this(). (Example: super(Animal.NAME) is OK, because NAME is
declared as a static variable.)
2-You cannot make a call to an instance method, or access an instance variable,
until after the super constructor runs.

[Abimaran Kugathasan]

Hama Kamal wrote:hi guys,,

in the SCJP6 book ,,,( by katy and bert ) >>>>page 133 >> rules for constructors:
i dont get the following two points could any one expalin it more with giving simple illustrating example for each!

1-Only static variables and methods can be accessed as part of the call to super()
or this(). (Example: super(Animal.NAME) is OK, because NAME is
declared as a static variable.)
2-You cannot make a call to an instance method, or access an instance variable,
until after the super constructor runs.

Please UseRealWords! Before creating an object, how can you access it's instance variables?

[Stephan van Hulst]

I don't see many spelling mistakes, just one small typo. Please carry on with the subject, guys.

[Hama Kamal]

many thanks however, i have one more question,, if it happens in a constructor to have call to both super and this ,, which one comes first?

[Stephan van Hulst]

You can't use both super() and this() in a constructor, only one of the two.