Query

[ashish mittal]

hi all ,
just have a little doubt . The khalid book says that ctors cannot display exceptions in header , whereas in more than one study notes , its said that ctors can throw any exception ???

[Ashik Uzzaman]

Ofcourse ctrs can throw any exception....
------------------
azaman

[Muhammad Farooq]

Construtor can throw an exception, but cannot declare the exception in their header with the clause "throws".
HTH
--Farooq

[Gurpreet Sachdeva]

Hello Ashish,
Its mistake in the book, please see its errata pages for more details.You can view it at: http://www.ii.uib.no/~khalid/pgjc/jcbook/errata.html

Gurpreet Sachdeva
For mock exams and other useful pages(including topics like bitshift operator, garbage collection,inner classes,etc) please visit: http://www.go4java.20m.com
[This message has been edited by Gurpreet Sachdeva (edited August 18, 2001).]

[Ashik Uzzaman]

Construtor can throw an exception, but cannot declare the exception in their header with the clause "throws

Farooq,
I disagree with u in this respect. Constructors can throw any exception and also can declara in its header the unhandled exceptions it throws. See the following code.

class ConstructorExa
{
ConstructorExa() throws Exception
{
System.out.println("Constructors can declare and throw exceptions!");
throw new Exception();
}
public static void main(Strintg []args)
{
try
{
new ConstructorExa();
}
catch(Exception e) {}
}
}

------------------
azaman

[Muhammad Farooq]

You are rite Aazman, Thanks for pointing out. Is it the same for checked or unchecked exceptions.
--Farooq

[ashok khetan]

hi all,
i am agree with ashik, it's a mistake in khalid book(page 101). if the constructor doesn't declare any checked exception in the header using throws clause then it would produce an error.
ashok.