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 Question: 1550 Page Views: 

What is the difference between String and StringBuilder type?



Posted By: Avi Date: 15 October 2009 04:12:05 AM
 Answer:

String type is immutable while a StringBuilder type is mutable. StringBuilder objects performs better as compared to String objects.

An immutable object is an object whose state cannot be modified after it is created.

When we declare a String variable using following statement, it creates a String object in memory:

String strTest = "StringData";

Now if we modify this String variable' value using following statement:

strTest = "ModifiedStringData";

This discards old variable and creates a new variable with new value in memory.

But StringBuilder objects uses the same space in memory even if you change the value. So StringBuilder objects performs better as compared to String objects.


Posted By: eTechPlanet

Date: 15 October 2009 04:12:05 AM
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