Exception handling and throwing

[KM Chen]

Hi,

Is any effeciency difference between the following 2 approaches for Exception Handling?
approach1:
method1()
{
try{
method2();
method3();
}
catch (Exception2 e2)
{
// handle Exception2
}
catch (Exception3 e3)
{
// handle Exception3
}
catch (Exception e)
{
// handle Exception
}

}

void method2() throws Exception2
{
// do something here
}

void method3() throws Exception3
{
// do something here
}


approach2:
method1()
{
try{
method2();
method3();
}
catch (Exception e)
{
// handle Exception
}

}

void method2() throws Exception2
{
try
{
// do something here
}
catch (Exception2 e2)
{
// handle Exception2
}

}

void method3() throws Exception3
{
try
{
// do something here
}
catch (Exception3 e3)
{
// handle Exception3
}

}


Thanks,
Kang

[Bear Bibeault]

Not an Ant question, is it? Moving this to the Java in General (beginner) forum.

[Karthikeyan Rajendraprasad]

Normally it is advisable to bubble out the exception and handle it at the calling point. in your case the approach one is advisable because the caller comes to know about the exception, where as in the second one the caller does not know what happened.
in approach 2 you handle the exception you catch and if you dont throw it again the catch it will result in an compilation error as you still say the method throws thw exception
[ November 02, 2004: Message edited by: Karthikeyan Rajendraprasad ]