StringBuffer in JavaScript

StringBuffer is a built-in class in JavaScript that provides a mutable sequence of characters. Unlike a regular string that is immutable, you can modify a StringBuffer object without creating a new one every time.

Creating a StringBuffer object

You can create a new StringBuffer object using the new keyword like this:

let strBuf = new StringBuffer();

By default, the StringBuffer object is initialized with an empty string.

Adding characters to a StringBuffer object

You can append characters to the end of a StringBuffer object using the append() method like this:

strBuf.append('Hello');
strBuf.append(' World');

The value of the StringBuffer object will be 'Hello World'.

Getting the value of a StringBuffer object

You can get the value of a StringBuffer object using the toString() method like this:

let str = strBuf.toString();

The variable str will contain the value 'Hello World'.

Modifying a StringBuffer object

You can modify a StringBuffer object like this:

strBuf.setCharAt(6, ',');

This will change the value of the StringBuffer object from 'Hello World' to 'Hello, World'.

Conclusion

StringBuffer in JavaScript provides a convenient and efficient way to modify strings without creating new ones every time. It is a helpful tool for any programmer who needs to work with complex string manipulation.