Java Utililty Methods Collection Join

List of utility methods to do Collection Join

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Description

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

Method

StringgetNeoString(String columnName, String delimiter, Collection input, String join)
get Neo String 
String result = "";
for (String field : input) {
    if (field != null) {
        if (field.equals("User"))
            field = "_FortressUser";
        if (requiresQuoting(field))
            field = "`" + field + "`";
        if (result.equals(delimiter) || result.equals(""))
...
Stringimplode(Collection items, String join)
implode 
String result = "";
int i = 0;
for (String s : items) {
    result += s;
    if (i < items.size() - 1) {
        result += join;
    i++;
...
StringinternalJoin(String sep, Collection pieces)
internal Join 
StringBuilder sb = new StringBuilder();
boolean skipSep = true;
Iterator<Object> iter = pieces.iterator();
while (iter.hasNext()) {
    if (skipSep) {
        skipSep = false;
    } else {
        sb.append(sep);
...
booleanisDisjoint(Collection a, Collection b)
Returns true if Collections are disjoint each other. 
if (a == null || b == null)
    return true;
Collection<?> tester = (a.size() < b.size()) ? a : b;
Collection<?> testant = (a.size() < b.size()) ? b : a;
for (Object o : tester) {
    if (testant.contains(o))
        return false;
return true;
Stringjoin(AbstractCollection s, String delimiter)
Join a Collection of Strings using a delimiter 
if (s == null || s.isEmpty()) {
    return "";
Iterator<String> iter = s.iterator();
StringBuilder builder = new StringBuilder(iter.next());
while (iter.hasNext()) {
    builder.append(delimiter).append(iter.next());
return builder.toString();
Stringjoin(CharSequence p, Collection collection)
join 
StringBuilder sb = new StringBuilder();
boolean f = true;
for (Object c : collection) {
    if (f)
        f = false;
    else
        sb.append(p);
    sb.append(c.toString());
...
StringBuilderjoin(CharSequence separator, Collection col)
join 
final StringBuilder result = new StringBuilder();
if (col != null) {
    for (Iterator<?> it = col.iterator(); it.hasNext();) {
        result.append(it.next());
        if (it.hasNext()) {
            result.append(separator);
return result;
Stringjoin(Collection c)
join 
return join(c, ", ");
Stringjoin(Collection c, String d)
join 
String result = "";
boolean isFirst = true;
for (Object o : c) {
    result += (isFirst ? "" : d) + o.toString();
    isFirst = false;
return result;
Stringjoin(Collection c, String delim)
join 
if (c == null || c.isEmpty())
    return "";
else if (c.size() == 1)
    return String.valueOf(c.iterator().next());
StringBuffer result = new StringBuffer();
for (Iterator i = c.iterator(); i.hasNext();)
    result.append(delim).append(i.next());
return result.substring(delim.length());
...