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

Stringjoin(String joiner, Collection strings)
join 
if (strings == null)
    return null;
StringBuffer buffer = new StringBuffer();
for (String string : strings) {
    if (buffer.length() > 0) {
        buffer.append(joiner);
    buffer.append(string);
...
Stringjoin(String sep, Collection objects)
join 
if (objects == null)
    return "";
StringBuffer res = new StringBuffer();
int i = 0;
for (Iterator iter = objects.iterator(); iter.hasNext();) {
    if (i > 0)
        res.append(sep);
    res.append(iter.next());
...
Stringjoin(String sep, Collection col)
Returns string that contains of all elements of passed collection joined together 
StringBuilder sb = new StringBuilder();
for (Object val : col) {
    if (sb.length() > 0)
        sb.append(sep);
    sb.append(castString(val));
return sb.toString();
Stringjoin(String sep, Collection col)
join 
StringBuilder sb = new StringBuilder();
for (Object val : col) {
    if (sb.length() > 0)
        sb.append(sep);
    sb.append(val != null ? val.toString() : "null");
return sb.toString();
Stringjoin(String sep, Collection parts)
join 
StringBuilder sb = new StringBuilder();
String s = ""; 
for (Object o : parts) {
    sb.append(s);
    if (o != null) {
        sb.append(o);
    s = sep;
...
Stringjoin(String sep, Collection values)
Joins a list of strings (or objects that can be converted to string via Object.toString()) into a single string with fields separated by sep. 
if (sep == null)
    throw new IllegalArgumentException();
if (values == null)
    return null;
if (values.isEmpty())
    return "";
StringBuilder s = null;
for (Object a : values) {
...
Stringjoin(String sep, Collection values)
Join collection into a single string, with a separator between. 
StringBuilder builder = new StringBuilder();
join(builder, sep, values);
return builder.toString();
Stringjoin(String sep, Collection strings)
join 
StringBuilder sb = new StringBuilder();
boolean first = true;
for (String s : strings) {
    if (!first) {
        sb.append(sep);
    } else {
        first = false;
    sb.append(s);
return sb.toString();
Stringjoin(String sep, Collection strs)
Join the string collection into one single string by the separator. 
return join(strs, sep);
Stringjoin(String separator, Collection c)
Returns a string formed by the concatenation of string versions of the elements in a collection, separated by a given separator. 
StringBuffer buffer = new StringBuffer();
Iterator it = c.iterator();
if (it.hasNext())
    buffer.append(it.next());
while (it.hasNext())
    buffer.append(separator + it.next());
return buffer.toString();