StringJoiner class is the new feature of Java 8 to add more useful functionality and usage to Java programming and is very helpful to a Java developer.
Java added new final class StringJoiner in java.util package. It is used to construct character sequences separated by delimiter. Using this we can create String by passing delimiters like comma(,), hyphen(-) etc. we can even pass prefix and suffix also.
This video explains StringJoiner class in details with coding. As this is newly added so this must be a hot topic for Java developer interview question.
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