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StringJoiner toString() method in Java

Last Updated : 11 Jul, 2025

The toString() of StringJoiner is used to convert StringJoiner to String. It returns the current value, consisting of the prefix, the values added so far separated by the delimiter, and the suffix, unless no elements have been added in which case, the prefix + suffix or the emptyValue characters are returned
Syntax: 

public String toString()


Returns: This method returns the string representation of this StringJoiner
Below programs illustrate the toString() method:
Example 1: To demonstrate toString() with delimiter " " 


Output: 
StringJoiner: Geeks for Geeks

 

Example 2: To demonstrate toString() with delimiter ", "


Output: 
StringJoiner: Geeks, for, Geeks, A, Computer, Portal

 
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