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

StringjoinLong(List lst, String prefix)
join Long 
final StringBuilder sb = new StringBuilder();
String separator = "";
for (Long f : lst) {
    sb.append(separator);
    separator = prefix;
    sb.append(f);
return sb.toString();
...
StringjoinNiceString(List strings)
join Nice String 
StringBuilder stringbuilder = new StringBuilder();
int i = 0;
for (String s : strings) {
    if (i > 0) {
        if (i == strings.size() - 1) {
            stringbuilder.append(" and ");
        } else {
            stringbuilder.append(", ");
...
ListjoinRecords(List first, List second, String key)
check each element of first list, and compare it to each element of second list. 
if (first != null && second != null) {
    for (int i = 0; i < first.size(); i++) {
        Map record1 = (Map) first.get(i);
        for (Iterator iterator1 = second.iterator(); iterator1.hasNext();) {
            Map record2 = (Map) iterator1.next();
            if (record2.get(key) != null && record2.get(key).equals(record1.get(key))) {
                record1.putAll(record2);
                break;
...
StringjoinRelativePath(List components)
Construct a relative path from the given components 
StringBuilder builder = new StringBuilder();
for (String component : components) {
    if (builder.length() > 0)
        builder.append('/');
    builder.append(component);
return builder.toString();
CharSequencejoinSegments(List segments, int startIndex, int endIndex)
Joins segments from startIndex to endIndex-1. 
StringBuilder sb = new StringBuilder();
appendSegments(sb, segments, startIndex, endIndex);
return sb;
StringjoinString(java.util.List values, String delimiter)
join String 
StringBuffer s = new StringBuffer();
boolean first = true;
for (String v : values) {
    if (!first) {
        s.append(delimiter);
    s.append(v);
    first = false;
...
StringjoinString(List array, String symbol)
join String 
String result = "";
if (array != null) {
    for (int i = 0; i < array.size(); i++) {
        String temp = array.get(i).toString();
        if (temp != null && temp.trim().length() > 0)
            result += (temp + symbol);
    if (result.length() > 1)
...
StringjoinString(List objs, String separator)
Create a string for a list of objects, with a specified separator, e.g. 
String s = "";
boolean first = true;
for (Object obj : objs) {
    if (first) {
        first = false;
    } else {
        s += separator;
    s += obj.toString();
return s;
StringjoinString(List val, String delim)
join String 
StringBuilder builder = new StringBuilder();
for (String l : val) {
    builder.append(l);
    builder.append(",");
return builder.toString().substring(0, builder.toString().length() - 1);
StringjoinStringList(String delimiter, List stringList)
join String List 
String result = "";
boolean isFirst = true;
for (String s : stringList) {
    if (!isFirst) {
        result = result + delimiter;
    isFirst = false;
    result = result + s;
...