Answer Posted / monika
string is immutable, that is it can not be extended.whereas
StringBuffer is mutable and can be extended.
Fro example :
Consider 2 statement : "Welcome " and "to Java World".
now assign first statement to string and string buffer.
String str = "Welcome" & StringBuffer strBuff = new
StringBuffer("Welcome");
Now if we add 2nd statement to both then :
str= str + "to Java World" -> In this case, it would dump
all the memory allocated with "welcome" and allocate a new
memory space to the entire string "Welcome to Java World" .
On the other hand, in strBuff :-
strBuff.append("to Java World") -> if simply allocate a
new memory space to only 2nd statement and add to link to
previous name.
| Is This Answer Correct ? | 51 Yes | 7 No |
Post New Answer View All Answers
can u draw class/object diagram for ATM
Hi we have an urgent requirement for Java/J2ee technical lead position & also looking for "Java Guidewire claimcentre" experienced professional for Bangalore location if interested can reach srisanh@gmail.com
What are the main classes of the list interfaces? : java collections
What are the differences between the java collection and the java list? : java collections
What is the use of hashcode in java ?
please mail me the interview question based on java/j2ee
Should we create system software ( e.g operating system ) in java ?
What are the interfaces in java collections? : java collections
HOW MUCH PERCENTAGE WE DEDUCT FOR OUR SUPPLIERS OR OTHER PROFESSIONALS
Which server-side script takes the input from JavaScript, can access the database if it needs to, and processes the data.
What is Generic in java? Where can we write Generic ( class or method or objects or etc...)? with simple example? Thanks, Bose. Infosys 2 In which way does a Primitive data type is passed ? Sun- Microsystems 4 what is the use of declaring constructor as private? Sai- Softech 5 what is difference between global methods and local methods? 1 What is meant by class loader and how many types are there? Apple 1 what is meaning of JIT? 4 What is an abstract class? Wipro 5 what is filters and its use? Virtusa 2 why is multiple inheritance not allowed in java? Elementus-Technologies 7 Differences between jdk 1.4 and 1.5 Wipro 4 is JVM platform dependent or independent..? IBM 6 what is main purpose of abstract class? 5 what is difference between colection and collections? Tech-Mahindra 11 What error occurs if a try-catch-finally statement sequence does not have a catch clause? 2 Explain the difference between scrollbar and scrollpane? 1 Explain the differences between public, private, protected and static? 4 Explain the difference between getAppletInfo and getParameterInfo? 1 Is Cegonsoft Pvt.Ltd. a good Institute? 4 Why only one Class is public in one file? Explain in details. Thanks in Advance. 11 Which method will get invoked first in a stand alone application?
What are the different types of ways where you can iterate over a list? : java collections
What are the types of the main implementing classes in the map interfaces? : java collections
What are the types of interface used in the java collections? : java collections
What are the different types of collections views being provided by the map interface? : java collections
