1. Overview
In this article, we will learn how to insert value or string at a particular index into StringBuilder in java.
StringBuilder is a mutable sequence of characters and it is recommended to use the non-synchronization applications.
StringBuilder class has a useful method insert() which takes the index and object as arguments.
When the data is added to the string builder at the given index then the remaining characters next to the given index are shifted to the right side. This is a costly operation in case of you have millions of characters in it.
