When to use StringJoiner over StringBuilder?
StringJoiner is very useful, when you need to join Strings in a Stream.
Task : Suppose we want the string “[George:Sally:Fred]”, where we have given a string array that contains “George”, “Sally” and “Fred”.
StringJoiner provide add(String str) method to concatenate the strings based on supplied delimiter,prefix and suffix in the constructor, but if we use StringBuilder to perform our task then first we have to append prefix and then iterate through string array and append the required delimiter after each element and finally append the prefix. Below is the java program to demonstrate both ways.
This article is contributed by Gaurav Miglani. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course.