Java 8 lambda: given a list, remove all elements except for the first element, without creating a new list [duplicate]

Question

I am new to java programming, been programing in php so I'm used to this type of loop:

int size = mapOverlays.size();
for(int n=1;n<size;n++)
{
    mapOverlays.remove(n);
}

So I want to remove everything but the first item, so why doesn't this work? As I get it, after removal, array keys are rearranged or not?

Answer 1

You could use

mapOverlays.subList(1, mapOverlays.size()).clear();