Java Utililty Methods StringJoiner Usage

List of utility methods to do StringJoiner Usage

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Description

The list of methods to do StringJoiner Usage are organized into topic(s).

Method

StringjoinRepeating(String element, String delimiter, int times)
join Repeating 
StringJoiner joiner = new StringJoiner(delimiter);
for (int i = 0; i < times; ++i) {
    joiner.add(element);
return joiner.toString();
StringjoinToString(String sep, Iterable items)
join To String 
final StringJoiner j = new StringJoiner(sep);
items.forEach(j::add);
return j.toString();
StringlistToString(List list)
list To String 
if (list == null || list.isEmpty())
    return null;
StringJoiner joiner = new StringJoiner(",", "[", "]");
for (Object o : list) {
    if (o == null)
        joiner.add("null");
    else
        joiner.add(o.toString());
...
voidprint(int[] a)
print 
StringJoiner sj = new StringJoiner(",", "[", "]");
for (int i = 0; i < a.length; i++) {
    sj.add(String.valueOf(a[i]));
System.out.println(sj.toString());
Stringsplit(String s)
split 
if (s == null || s.isEmpty()) {
    return s;
StringJoiner joiner = new StringJoiner(" ");
for (String word : s.split(RE_CAMELCASE_OR_UNDERSCORE)) {
    if (!word.isEmpty()) {
        joiner.add(word.trim());
return joiner.toString();
voidthrowSafeguardError(String thisClassName, String thisMethodsName, String superClassName, String... namesOfMethodsWhoseDefaultImplementationUsesThisMethod)
A utility method throwing an error to indicate that a method used by a default implementation of another method has not been overridden. 
String oneOf = namesOfMethodsWhoseDefaultImplementationUsesThisMethod.length > 1 ? "one of " : "";
throw new Error(thisMethodsName + " is being invoked but has not been overridden by " + thisClassName + ". "
        + "It is probably being invoked by the default implementation of " + oneOf
        + join(namesOfMethodsWhoseDefaultImplementationUsesThisMethod) + " in " + superClassName
        + ", unless some other overriding method invokes it. " + "If the default implementation of "
        + join(namesOfMethodsWhoseDefaultImplementationUsesThisMethod) + " in " + superClassName
        + " is being used, " + thisMethodsName + " should be overridden," + " or if " + thisMethodsName
        + " does not make sense for " + thisClassName
...
StringtoCVS(Set buildRecordSetIds)
to CVS 
StringJoiner joiner = new StringJoiner(",");
buildRecordSetIds.forEach(el -> joiner.add(el.toString()));
return joiner.toString();