Difference between a stringbuffer and a string class?, JAVA Programming

Assignment Help:

 

String is immutable in java: you can't change a string object but can replace it by creating a new object instance. Creating a new instance is rather expensive.

 

//Non efficient version using immutable String

 

String out = "Some text"

 

Int cou = 80;

for(int i =0; i

output += i;

}

return out;

 

The above code would build 79 new String objects, of which 78 would be thrown away

immediately. Creating new objects is not efficient.

 

StringBuffer is mutable in java: use StringBuilder or StringBuffer when you want to change the contents. StringBuilder was started in Java 5 and it is identical in all function respects to StringBuffer except that it is not synchronized, which gives it slightly faster at the cost of not being thread-safe.

 

// efficient version of using mutable StringBuffer

StringBuffer out = new StringBuffer(110);// set an stating size of 110

out.append(" text");

for(int i =0; i

out.append(i);

}

return out.toString();

 

The above code builds only two new objects, the final String and the StringBuffer that is given. StringBuffer expands as needed, which is costly however, so it could be better to initialize the StringBuffer with the needed size from the start as shown.

 


Related Discussions:- Difference between a stringbuffer and a string class?

Write a program calculates the resistance of group resistors, The formula f...

The formula for resistors linked in parallel is a little more complex. Given two resistors along with resistances R1 and R2 linked in parallel the equivalent resistance is given th

What is application context module, The Application context module makes sp...

The Application context module makes spring a framework. This module extends the concept of BeanFactory, giving support for internationalization (I18N) messages, application lifecy

Rebuilding a server environment, Project Description: We prepare and ope...

Project Description: We prepare and operate smartphone application.(Picture sharing and social networking) But there are problems in server side. It's very slow. So we

Explain labeled loops in details, Explain Labeled Loops in details ? Ge...

Explain Labeled Loops in details ? Generally inside nested loops break and continue exit the innermost enclosing loop. For instance consider the subsequent loops. for (int i=1

Define in detail the building of webpage, Question 1 Describe the browser ...

Question 1 Describe the browser components and its features Question 2 Define in detail the building of webpage Question 3 How to use forms? Describe with an example

Explain about java sdk, Java SDK is not so comfortable with people used to ...

Java SDK is not so comfortable with people used to command line interpreter. IDEs contain compilers, editors, debugging facilities, drag and drop methods, etc. This compiler strive

What is preferred organizational structure for organization, What is the pr...

What is the preferred organizational structure for the organization? Preferred Organizational Structure for organization is hierarchal. Where there is various departments inter

High quality leads and directory scraping, Project Description: (1) I wa...

Project Description: (1) I want a comprehensive list of Australian chiropractors. The data requires coming from various sources including Google but the following are obligatory

About object, How memory allocated for a object

How memory allocated for a object

What are the different modules in spring framework, Different modules in sp...

Different modules in spring framework are:- a)  The Core container module b)  AOP module (Aspect Oriented Programming) c)  Application context module d) JDBC abstractio

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd