what is the difference between forEach and iterators
Can anyone explai
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LLike both does the same thing why using iterators
Dan enhanced for loop uses iterators internally if you mean that
Dit's a syntax thats easier readable
LThen why getting tires using iterators
LI mean isnt foreach stronger and has the same results?
LAh okay let me read it sorry i didnt see it
NIn some reason you would want to have an "iteration variable/counter"
Nthats when you would use a "normal" for loop
Nwhat do you mean by stronger?
LI mean easier
Dthere are some things you can do with iterators that cannot be done with enhanced for loops/foreach
Lfor(String sl: StringList){
}DFor example,
Iterator allows removing the current elementLcant foreach does the same?
DHow would you remove the current element in a foreach loop?
DLfor(String s: StringList{
StringList.remove(s);
} Is this valid?Dthat
- will throw an exception in most cases
- requires a matching
removemethod - needs to check the entire data structure if you are working with
Lists
T"ConcurrentModificationException"
Dyep
TIf it's for removing items, there's a removeIf now
Dwell,
Iterator can be used for avoiding that exception in scenarios like that
KIterator doesn't help much when you need to add or replace. You'd need ListIterator
K(and it still doesn't nest well if the logic is still nested)
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