some Qs

[xlx16]

hi guys i have a couple of Qs.

1.what is javadoc and how it works?

2.what Strong typing means?

3.if we want to control the input ,it is better to use exeption handeling (try chatch),or a single is to control the worng input,
whitch one is faster?

4.look at the code bellow:
try{
//some code }
catch(ArithmaticExeption a){
}
catch(IndexOutOfBoundsExeption a){
}
look the both exeptions have the same name (a),is that right?

when i was reading a book i faced this questions(i have to mention
these are not book`s questions or homework).

thanks alot.

[stephen84s]

1.what is javadoc and how it works?

2.what Strong typing means?

My Answer :- STFW

3.if we want to control the input ,it is better to use exeption handeling (try chatch),or a single is to control the worng input,
whitch one is faster?

Exception Handling should be used for only handling "exceptional" situations. What you have mentioned can be done by performing appropriate validations on Input

catch(ArithmaticExeption a){
}
catch(IndexOutOfBoundsExeption a){
}

Yes its perfectly fine to have both variables named "a", because "a" is visible only inside the corresponding catch blocks and not outside of them. It wouldn't have killed you to just compile a program with the above situation, if it was incorrect at most you would have received a compile error.