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

ListgetFirstRowResults(List> llo, String reason)
Gets the first row results. 
if (llo.size() < 1)
    throw new RuntimeException("Insufficient row results, " + reason);
return llo.get(0);
StringgetFirstString(Object list)
unqualify given dateVal. 
if (list == null) {
    return null;
if (list instanceof List) {
    return ((List) list).size() == 0 ? null : (String) ((List) list).get(0);
Class<?> arrType = list.getClass().getComponentType();
if ((arrType != null) && arrType.isPrimitive()) {
...
StringgetFirstValueString(List values)
get First Value String 
if (values.isEmpty()) {
    return null;
Object first = values.get(0);
return first != null ? first.toString() : null;
StringgetFirstValueString(List values)
Gets the first value of the given list of values. 
if ((values != null) && !values.isEmpty()) {
    return values.get(0);
return null;
intgetIndexOfFirstMatchingProperty(List propertyNames, String follower)
get Index Of First Matching Property 
int propertySize = propertyNames.size();
for (int propIndex = 0; propIndex < propertySize; propIndex++) {
    if (((String) propertyNames.get(propIndex)).startsWith(follower)) {
        return propIndex;
return -1;
ListgetListBetween(String inputStr, String first, String second, List list)
get List Between 
String str = inputStr;
int idx = str.indexOf(first);
while (idx > 0) {
    list.add(getStringBetween(str, first, second));
    str = str.substring(idx + first.length());
    idx = str.indexOf(first);
return list;
...
byte[]getNFirstBytes(int n, List byteList)
get N First Bytes 
List<Byte> nFirstByteList = byteList.subList(0, n);
byte[] nFirstBytes = new byte[n];
for (int i = 0; i < nFirstByteList.size(); i++) {
    nFirstBytes[i] = nFirstByteList.get(i);
return nFirstBytes;
ObjectgetOnlyFirst(List obj)
get Only First 
if (obj.size() == 1) {
    return obj.get(0);
} else {
    return null;
ListgetPage(List all, int first, int pageSize)
get Page 
int last = first + pageSize;
if (last > all.size()) {
    last = all.size();
return all.subList(first, last);
StringgetStringFirstResult(List> llo, String reason)
Gets the string first result. 
Object o = getNthResult(llo, 0, reason);
if (!(o instanceof String))
    throw new RuntimeException("Result not String, " + reason);
return (String) getNthResult(llo, 0, reason);