java - Is catching a specific exception less expensive than catching a generic one? -


say i'm loading bitmap onto android device. there many possible exceptions can thrown. sake of simplicity let's take nullpointerexception , outofmemoryerror.

now have 2 pieces of code.

code 1

try{ //load bitmap } catch(exception e) { //do }

code 2

try{ //load bitmap catch (nullpointerexception e) { //do } catch(outofmemoryerror e) { //do else }

is 1 piece of code more effective other performance wise? if so, why?

from byte code point of view more effective (less code) first one.

but should never @ performance in way.

if have same behavior type of exceptions, should use first bunch of code, in other way, second one.

in byte code have following code responsible catching eceptions:

   l2     linenumber 7 l2    frame same1 java/lang/nullpointerexception     astore 1     goto l4    l3     linenumber 9 l3    frame same1 java/lang/exception     astore 1    l4

so each exceptions has code responsible catching that, said such minor difference shouldn't taken consideration.


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