Java Utililty Methods List First Item

List of utility methods to do List First Item

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Description

The list of methods to do List First Item are organized into topic(s).

Method

TremoveFirst(List list)
Remove the first element in the list. 
return list.remove(0);
TremoveFirstElement(List l)
Removes and returns the element at index 0, or null if the List is empty. 
if (l.isEmpty()) {
    return null;
return l.remove(0);
ListremoveFirstHalfElements(final List list)
remove First Half Elements 
if (list.size() < 2) {
    return list;
return list.subList(list.size() / 2 - 1, list.size());
Stringreplace(int codePoint, int firstCharacterInGroup, List referenceList)
replace 
int relative = codePoint - firstCharacterInGroup;
int taget = relative % referenceList.size();
return referenceList.get(taget);
voidswap(List list, int firstIndex, int secondIndex)
Swaps the two rows. 
Object backup;
backup = list.get(firstIndex);
list.set(firstIndex, list.get(secondIndex));
list.set(secondIndex, backup);