StringBuffer Class & Methods in Java | Java Tutorial for Beginners 2023 | Parnika Tutorials

"StringBuffer Class & Methods in Java | Java Tutorial for Beginners 2023 | Parnika Tutorials

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00:00 - Introduction
00:55 - Drawbacks of String class
07:25 - StringBuffer
13:01 - Methods in StringBuffer class
28:22 - Implementation of methods in Notepad++

prevois video - #17 STRING CLASS & STRING METHODS - JAVA PROGRAMMING | JAVA COURSE FOR BEGINNERS
https://youtu.be/QXAEhvrEkHs

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StringBuffer is a peer class of String that provides much of the functionality of strings. The string represents fixed-length, immutable character sequences while StringBuffer represents growable and writable character sequences. StringBuffer may have characters and substrings inserted in the middle or appended to the end.

1. StringBuffer(): It reserves room for 16 characters without reallocation

StringBuffer s = new StringBuffer();

2. StringBuffer( int size): It accepts an integer argument that explicitly sets the size of the buffer.

StringBuffer s = new StringBuffer(20);

3. StringBuffer(String str): It accepts a string argument that sets the initial contents of the StringBuffer object and reserves room for 16 more characters without reallocation.

StringBuffer s = new StringBuffer("parnikatutorials");

append() Used to add text at the end of the existing text.
length() The length of a StringBuffer can be found by the length( ) method
capacity() the total allocated capacity can be found by the capacity( ) method
charAt()
delete() Deletes a sequence of characters from the invoking object
deleteCharAt() Deletes the character at the index specified by loc
ensureCapacity() Ensures capacity is at least equals to the given minimum.
insert() Inserts text at the specified index position
length() Returns length of the string
reverse() Reverse the characters within a StringBuffer object
replace() Replace one set of characters with another set inside a StringBuffer object