3.Stringbuilder class in java

Java Stringbuilder class

• Strings in java are immutable (not editable)

• so to make changes in string we use this string builder class which makes the string mutable (editable)

• there are different methods which comes with stringbuilder class as shown below
  

1.Append:

• This method will simply append an string to existing string.

2.Insert:

• this will insert an character or strig at given position in given string.

3.Replace:

• this will replace certain part of string with another string.

• it take position of string which need to be replaced.

4.Delete:

• this method will delete certain part of string by taking starting and ending position.