What is the use of StringBuffer class can anyone explain with an example?

The java.lang.StringBuffer class is a thread-safe, mutable sequence of characters. Following are the important points about StringBuffer −

• A string buffer is like a String, but can be modified.

• It contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls.

• They are safe for use by multiple threads.

Every string buffer has a capacity.

Example

 Live Demo

import java.lang.*; public class StringBufferDemo {    public static void main(String[] args) {       StringBuffer buff = new StringBuffer("tutorials ");       System.out.println("buffer = " + buff);       // appends the string argument to the string buffer       buff.append("point");       // print the string buffer after appending       System.out.println("After append = " + buff);       buff = new StringBuffer("1234 ");       System.out.println("buffer = " + buff);       // appends the string argument to the string buffer       buff.append("!#$%");       // print the string buffer after appending       System.out.println("After append = " + buff);    } }

Output

buffer = tutorials After append = tutorials point buffer = 1234 After append = 1234 !#$%