private void removeEntry(Entry entry) {
public void removeEntry(Entry entry) {
	private void removeEntry(Entry entry) {		if(entry.prev == null) {			if(entry.next == null) {				first = null;				last = null;			} else {				entry.next.prev = null;				first = entry.next;			}		} else {			entry.prev.next = entry.next;			if(entry.next == null)				last = entry.prev;			else				entry.next.prev = entry.prev;		}	}