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StringJoiner add() method in Java

  • Difficulty Level : Basic
  • Last Updated : 12 Dec, 2021

The add(CharSequence newElement) of StringJoiner adds a copy of the given CharSequence value as the next element of the StringJoiner value. If newElement is null, then “null” is added.
Syntax: 

public StringJoiner add(CharSequence newElement)

Parameters: This method takes a mandatory parameter newElement which is the element to be added.
Returns: This method returns a reference to this StringJoiner
Below programs illustrate the add() method:
Example 1: To demonstrate add() with delimiter ” ” 

Java




// Java program to demonstrate
// add() method of StringJoiner
 
import java.util.StringJoiner;
 
public class GFG1 {
    public static void main(String[] args)
    {
 
        // Creating StringJoiner with delimiter " "
        StringJoiner str = new StringJoiner(" ");
 
        // Adding elements in the StringJoiner
        str.add("Geeks");
        str.add("for");
        str.add("Geeks");
 
        // Print the StringJoiner
        System.out.println(str.toString());
    }
}
Output: 
Geeks for Geeks

 

Example 2: To demonstrate add() with delimiter “,”

Java




// Java program to demonstrate
// add() method of StringJoiner
 
import java.util.StringJoiner;
 
public class GFG1 {
    public static void main(String[] args)
    {
 
        // Creating StringJoiner with delimiter ","
        StringJoiner str = new StringJoiner(",");
 
        // Adding elements in the StringJoiner
        str.add("Geeks");
        str.add("for");
        str.add("Geeks");
 
        // Print the StringJoiner
        System.out.println(str.toString());
    }
}
Output: 
Geeks,for,Geeks

 


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