StringJoiner toString() method in Java

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 delimeter ” ”

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// Java program to demonstrate
// toString() method of StringJoiner
  
import java.util.StringJoiner;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Creating StringJoiner with delimeter " "
        StringJoiner str = new StringJoiner(" ");
  
        // Adding elements in the StringJoiner
        str.add("Geeks");
        str.add("for");
        str.add("Geeks");
  
        // Print the StringJoiner
        // using toString() method
        System.out.println("StringJoiner: "
                           + str.toString());
    }
}

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Output:

StringJoiner: Geeks for Geeks

Example 2: To demonstrate toString() with delimeter “, ”

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// Java program to demonstrate
// toString() method of StringJoiner
  
import java.util.StringJoiner;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Creating StringJoiner with delimeter ""
        StringJoiner str = new StringJoiner(", ");
  
        // Adding elements in the StringJoiner
        str.add("Geeks");
        str.add("for");
        str.add("Geeks");
        str.add("A");
        str.add("Computer");
        str.add("Portal");
  
        // Print the StringJoiner
        // using toString() method
        System.out.println("StringJoiner: "
                           + str.toString());
    }
}

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Output:

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


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