Java Utililty Methods String Join

List of utility methods to do String Join

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Description

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

Method

MapjoinValues(Map map, String separator)
Joins each collection of values in a given Map into their String representation, with a given separator between each value. 
if (map == null || map.isEmpty()) {
    return Collections.emptyMap();
LinkedHashMap<K, String> out = new LinkedHashMap<K, String>();
for (Map.Entry<K, V> e : map.entrySet()) {
    out.put(e.getKey(), join(e.getValue(), separator));
return out;
...
StringjoinWithSeparation(String a, String separator, String b)
Appends two strings, inserting separator if either is empty 
if (a.length() == 0)
    return b;
if (b.length() == 0)
    return a;
return a + separator + b;
Stringmerge(ArrayList pArrayList, String pJoin)
merge 
String lReturn = "";
if (pArrayList.size() > 0) {
    lReturn += (String) pArrayList.get(0);
    for (int i = 1; i < pArrayList.size(); i++) {
        lReturn += pJoin + (String) pArrayList.get(i);
return lReturn;
...
voidmergeDependencies(Set bundleDeps, List deps, Map disjointSets)
merge Dependencies 
if (deps != null) {
    bundleDeps.addAll(deps);
    Iterator iter = deps.iterator();
    while (iter.hasNext()) {
        String name = (String) iter.next();
        mergeDependencies(bundleDeps, (List) disjointSets.get(name), disjointSets);
Stringprefixed_join(String padder, Vector v, boolean quoted)
prefixejoin 
StringBuffer sb = new StringBuffer();
for (Iterator<String> iter = v.iterator(); iter.hasNext();) {
    sb.append(padder);
    if (quoted) {
        sb.append('"');
    sb.append((String) iter.next());
    if (quoted) {
...
Stringstrjoin(String sep, String... args)
Concatentate string, using a separator 
return join(sep, args);
StringstrjoinNL(String... args)
strjoin with a newline as the separator 
return join("\n", args);