Java Utililty Methods List First Item

List of utility methods to do List First Item

  1. HOME
  2. Java
  3. L
  4. List First Item

Description

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

Method

Listfirst_nItems(int n, Collection fromList)
firsn Items 
if (n >= fromList.size())
    return new ArrayList<T>(fromList);
return (new ArrayList<T>(fromList)).subList(0, n);
BooleanfirstBoolean(List list)
first Boolean 
A a = first(list);
if (a == null) {
    return null;
if (a instanceof Boolean) {
    return (Boolean) a;
try {
...
booleanfirstColumnRemovable(List data)
first Column Removable 
boolean allEmpty = true;
for (String s : data) {
    if (s.length() == 0) {
        continue;
    allEmpty = false;
    final char c = s.charAt(0);
    if (c != ' ' && c != '\t') {
...
EfirstElement(List list)
Returns the first element of the given List . 
int index = 0;
return elementAt(list, index);
TfirstItem(Iterable list)
Provides the first item of the given list. 
if (list != null) {
    Iterator<T> i = list.iterator();
    if (i.hasNext()) {
        return i.next();
return null;
TfirstItem(List items)
first Item 
if (items == null) {
    return null;
Iterator<T> iterator = items.iterator();
if (iterator.hasNext()) {
    return iterator.next();
return null;
...
StringfirstMatch(List src, String... lookup)
first Match 
if (lookup == null) {
    return null;
Arrays.sort(lookup);
for (String s : src) {
    int matchedIndex = Arrays.binarySearch(lookup, s);
    if (matchedIndex >= 0) {
        return lookup[matchedIndex];
...
ObjectfirstObjectFromList(List list)
first Object From List 
Object result = null;
if (list != null && list.size() > 0) {
    result = list.get(0);
return result;
TfirstOrDefault(List items)
first Or Default 
if (items.size() < 1)
    return null;
return items.get(0);
StringfirstStartsWith(List lines, String startsWith)
return first line that starts with prefix, null otherwise 
for (String l : lines) {
    if (l.startsWith(startsWith)) {
        return l;
return null;