Enhanced for-loop by java5 needs to be more enhanced?

Question

Hi, all of you,
I often need to iterate a collection. Sometimes I need to iterate a subset of a collection. Then I have found the enhanced for-loop is not enough.
Before Java 5, you did the following:
for(int i=0;i<collection.size();i++) {
Object object = collection.get(i);
doSomething(object);
}Thanks to Java 5, you can do the following:
for(Object object:collection) {
doSomething(object);
}However, before Java 5, I have the flexibility to skip the first two lines by purpose, as follows
for(int i=2;i<collection.size();i++) {
Object object = collection.get(i);
doSomething(object);
}What should I do the same thing with Java 5?
Kind regards.
Pengyou

Answer 1

pengyou wrote:
JoachimSauer wrote:
masijade. wrote:
uncle_alice wrote:
Or, if the collection is a List: for (Object obj : theList.subList(2, theList.size())) {
doSomething(obj);
Ah, yeah, I keep forgetting about that. ;-)
Actually, I just never think about it. ;-)I think you're not alone. I find that subList() is severly under-used. It simplifies a lot of operations (ever tried someList.subList(0, someIndex).clear()? Try it).The solution is nice except it might throw IndexOutOfBoundsException.Which probably means a bug somewhere else. The way to avoid runtime exceptions is to write code that doesn't put you into situations where they'll arise, not to avoid them being thrown