StringJoiner length() method in Java

Difficulty Level : Basic
Last Updated : 12 Sep, 2018

The length() of StringJoiner is used to find out the length of the StringJoiner in characters. It returns the length of the String representation of this StringJoiner. Note that if no add methods have been called, then the length of the String representation (either prefix + suffix or emptyValue) will be returned. The value should be equivalent to toString().length().

Syntax:

public int length()

Returns: This method returns the length of the current value of StringJoiner

Below programs illustrate the length() method:

Example 1: To demonstrate length() with delimeter ” ”

// Java program to demonstrate
// length() 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
        System.out.println("StringJoiner: "
                           + str.toString());
  
        // Printing the length of str
        // using length() method
        System.out.println(str.length());
    }
}

Output:

StringJoiner: Geeks for Geeks
15

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

// Java program to demonstrate
// length() 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
        System.out.println("StringJoiner: "
                           + str.toString());
  
        // Printing the length of str
        // using length() method
        System.out.println(str.length());
    }
}

Output:

StringJoiner: Geeks, for, Geeks, A, Computer, Portal
38

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