karthika gkumar

java is case sensitive. but while representing hexadecimal numbers both upper case and lower case letters allowed. how it is possible?

i changed my display name
thanks

hi

what is coupling? what is cohesion?
i cant understand clearly those things in K&B book
please explain

the only way a constructor can be invoked is from within another construtor.
that means we cant call a constructor just like methods right?

and

how the constructor of Object is invoked?

thank you

in java all the classes are extend with Object class implicitly.
java does not support multiple inheritence.
but when we are extending a class with some other class doesnt that mean that class is extended twice?