Java Utililty Methods List Join

List of utility methods to do List Join

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Description

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

Method

StringjoinColumnArray(List columnArray)
join Column Array 
if (columnArray == null || columnArray.size() == 0) {
    return null;
StringBuilder column = new StringBuilder();
int columnSize = columnArray.size();
for (int i = 0; i < columnSize; i++) {
    column.append(columnArray.get(i));
    if (i + 1 < columnSize) {
...
StringjoinCommaAnd(List objs)
Returns a comma separated list, but the last comma is an "and". 
int size = objs.size();
if (size == 0) {
    return "";
} else if (size == 1) {
    return objs.get(0).toString();
} else {
    StringBuilder sb = new StringBuilder();
    Iterator<T> iter = objs.iterator();
...
StringjoinCommaSeparatedList(List list)
Joins a list of Strings to a comma separated single String. 
return joinList(list, ", ");
StringjoinDoubles(List list)
join Doubles 
String joined = "";
for (double item : list) {
    joined += item + " ";
return joined.trim();
StringjoinIntegers(List integers, String token)
join Integers 
if (integers == null || integers.isEmpty()) {
    return "";
StringBuilder buffer = new StringBuilder();
boolean appendToken = false;
for (Integer integer : integers) {
    if (appendToken) {
        buffer.append(token);
...
StringBuilderjoinLines(List lines)
join Lines 
StringBuilder builder = new StringBuilder();
for (String line : lines) {
    builder.append(line);
return builder;
StringjoinLinesWithImplicitFinalLine(final List lines)
Joins the specified collection of lines into a string when the final line is implicitly specified. 
final StringBuilder sb = new StringBuilder();
for (final CharSequence line : lines) {
    sb.append(line);
    sb.append('\n');
return sb.toString();
StringjoinList(final List list)
Joins the elements using comma as a separator. 
if (list == null) {
    return null;
return join(list.toArray(new String[0]), ",");
StringjoinList(final List list, final String sep)
Given a list and some separator string, create a string with the entries in the list joined with the separator. 
StringBuilder str = new StringBuilder();
for (int i = 0; i < list.size(); i++) {
    str.append(list.get(i).toString());
    if (i < list.size() - 1) {
        str.append(sep);
return str.toString();
...
StringjoinList(List list, String separator)
join List 
StringBuilder result = new StringBuilder();
for (Object o : list) {
    if (o == null || o.equals(""))
        continue;
    result.append(o.toString()).append(separator);
int i = result.lastIndexOf(separator);
if (i >= 0) {
...