StringBuilder Class

StringBuilder Class

The StringBuilder class is used for very fast string concatenation. If you use conventional string concatenation then it will run very slow because a string is held in an array. Each concatenation causes the array to increase its size and the memory has to be copied to a new location internally. This is very slow

Represents a mutable string of characters. This class cannot be inherited.

If we want to do a concatenation or any other operation to an existing string say,

string test="malayalam";

i want to add english to the string a .

test.append("english");

so now the string test becomes "malayalamenglish."But the old value in the string test="malayalam" get over writed.

String is immutable.

eg:

string test="malayalam";

test=malayalam+english

test=malayalmenglish..

But here the previous value wont get destroed.Because another memory location is created for the answer test=" malayalamenglish"