StringJoiner toString() method in Java 8

The toString() method of the StringJoiner class in Java8 is used to return the string representation of the StringJoiner.

The syntax of the toString() method is as follows:

String toString()

To work with the StringJoiner in Java 8, import the following package:

import java.util.StringJoiner;

The following is an example to implement StringJoiner toString() method in Java:

Example

 Live Demo

import java.util.StringJoiner;
public class Demo {
   public static void main(String[] args) {
      StringJoiner strJoin = new StringJoiner(" ");
      strJoin.add("One");
      strJoin.add("Two");
      strJoin.add("Three");
      strJoin.add("Four");
      strJoin.add("Five");
      System.out.println(strJoin.toString());
   }
}

output

One Two Three Four Five

Above, we have set the delimiter as a whitespace:

StringJoiner strJoin = new StringJoiner(" ");