Java Utililty Methods Collection to Array

List of utility methods to do Collection to Array

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Description

The list of methods to do Collection to Array are organized into topic(s).

Method

String[]toStringArray(Collection collection)
Returns an array containing string representations of the elements in the collection. 
String[] result = new String[collection.size()];
int index = 0;
for (Object entry : collection) {
    result[index] = String.valueOf(entry);
    index += 1;
return result;
String[]toStringArray(Collection collection)
to String Array 
if (collection == null)
    throw new RuntimeException("Can't do toStringArray. Collection is Null");
return collection.toArray(new String[collection.size()]);
String[]toStringArray(Collection collection)
to String Array 
if (collection == null) {
    return null;
return collection.toArray(new String[collection.size()]);
String[]toStringArray(Collection collection)
to String Array 
return collection != null ? collection.toArray(new String[collection.size()]) : null;
String[]toStringArray(Collection collection)
to String Array 
return collection == null || collection.isEmpty() ? EMPTY_STRING_ARRAY
        : toArray(collection, new String[collection.size()]);
String[]toStringArray(Collection items)
Convert a collection of strings into a string array. 
String[] result = new String[items.size()];
int i = 0;
for (String s : items) {
    result[i++] = s;
return result;
String[]toStringArray(Collection list)
Converts a collection of String s to a String array. 
return list.toArray(new String[list.size()]);
String[]toStringArray(Collection strings)
INTERNAL: Utility method that converts a collection of strings to an array of strings. 
String[] _strings = new String[strings.size()];
strings.toArray(_strings);
return _strings;
String[]toStringArray(final Collection fields)
Converts a Collection to an array of Strings. 
final String[] defaultFields = new String[fields.size()];
int i = 0;
for (final Object f : fields) {
    defaultFields[i++] = f.toString();
return defaultFields;
String[]toStringArray(final Collection collection)
to String Array 
if (collection == null) {
    return null;
final String[] retval = new String[collection.size()];
int i = 0;
for (final Object o : collection) {
    retval[i] = String.valueOf(o);
    i = i + 1;
...