12.0 StringJoiner class in JAVA 8 | How to Use the StringJoiner with examples

StringJoiner is a class used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and ending with a supplied suffix.
This feature can also be done with the help of the StringBuilder class to append delimiter after each string, StringJoiner provides an easy way to do that without much code to write. 
StringJoiner Constructors :
1. StringJoiner(CharSequence delimiter):
 
2. StringJoiner(CharSequence delimiter, CharSequence prefix, CharSequence suffix):

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