Java Utililty Methods Collection Convert

List of utility methods to do Collection Convert

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Description

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

Method

StringtoCommaSep(Collection strings)
to Comma Sep 
if (strings.isEmpty()) {
    return "&bNone";
StringBuilder sb = new StringBuilder();
strings.forEach(s -> sb.append("&3").append(s).append("&7, "));
return sb.delete(sb.length() - 2, sb.length()).toString();
StringtoCommaSeparatedString(final Collection items)
Returns string containing item names, each separated from other with comma and space. 
String result = "";
for (final Iterator<? extends Object> iter = items.iterator(); iter.hasNext();) {
    result += iter.next();
    if (iter.hasNext()) {
        result += COMMA_SPACE_SEPARATOR;
return result;
...
StringtoCommaSeparatedValues(Collection list)
to Comma Separated Values 
StringBuilder csv = new StringBuilder();
if (list != null) {
    Object[] array = list.toArray(new Object[list.size()]);
    for (int i = 0; i < list.size(); i++) {
        if (i > 0) {
            csv.append(",");
        if (array[i] != null) {
...
StringtoCommaSepared(Collection aListOfString)
to Comma Separed 
String res = "";
if (isNotEmpty(aListOfString)) {
    res = aListOfString.toString();
return res;
StringtoCommaString(Collection c)
to Comma String 
String commaStr = "";
for (String str : c) {
    commaStr = commaStr + str + ",";
commaStr = commaStr.substring(0, commaStr.length() - 1);
return commaStr;
StringtoCsvString(Collection collection)
Constructs a single String by iterating over the elements in the collection parameter, calling toString() on each method. 
return toXsvString(collection, ", ");
StringtoCSVString(Collection theCollection, String theSeparator)
Returns a csv string of the given values. 
if ((theCollection == null) || (theSeparator == null)) {
    return "";
StringBuffer sbReturn = new StringBuffer();
boolean isFurther = false;
for (T theElement : theCollection) {
    if (isFurther) {
        sbReturn.append(theSeparator);
...
StringtoDelimitedList(Collection values, String delimiter)
to Delimited List 
StringBuilder sb = new StringBuilder();
boolean first = true;
for (T value : values) {
    if (first) {
        first = false;
    } else {
        sb.append(delimiter);
    sb.append(value);
return sb.toString();
StringtoDelimitedString(Collection c, String delimiter)
to Delimited String 
if (c.isEmpty()) {
    return "";
StringBuffer result = new StringBuffer();
for (Iterator i = c.iterator(); i.hasNext();) {
    Object o = i.next();
    result.append(delimiter + ((o == null) ? "" : o.toString()));
return result.substring(delimiter.length());
StringtoDelimitedString(Collection coll, String delim)
to Delimited String 
return toDelimitedString(coll, delim, "", "");