Given a List of String, the task is to convert the List to a comma separated String in Java.
Examples:
Input: List<String> = ["Geeks", "ForGeeks", "GeeksForGeeks"] Output: "Geeks, For, Geeks" Input: List<String> = ["G", "e", "e", "k", "s"] Output: "G, e, e, k, s"
Approach: This can be achieved with the help of join() method of String as follows.
- Get the List of String.
- Form a comma separated String from the List of String using join() method by passing comma ‘, ‘ and the list as parameters.
- Print the String.
Below is the implementation of the above approach:
Program:
Java
// Java program to convert List of String// to comma separated Stringimport java.util.*;public class GFG { public static void main(String args[]) { // Get the List of String List<String> list = new ArrayList<>( Arrays .asList("Geeks", "ForGeeks", "GeeksForGeeks")); // Print the List of String System.out.println("List of String: " + list); // Convert the List of String to String String string = String.join(",", list); // Print the comma separated String System.out.println("Comma separated String: " + string); }} |
Output
List of String: [Geeks, ForGeeks, GeeksForGeeks] Comma separated String: Geeks,ForGeeks,GeeksForGeeks