Use of transient

Question

by learning i came to know that use of transient variable may increase the performance for a web application,
But i am not very clear where exactly i have to use transient.
suppose this is my class,
public class ConServ extends HttpServlet {
     transient private  Vector allNodeVC;
     transient private  Vector allNodeVC1;
     //database acess class
                transient private Connection conn;
     transient private DB2Pool db2Pool;
     //xml class
                transient private  XmlClass map;
     transient private  XmlClass ws;
}the HttpServlet class implements java.io.Serializable,
now if i use "transient " for the upper vaiables will it effect in execution time?
and what will be the diffrent using and without using transient in this case?

Answer 1

debdutta wrote:
jbish wrote:
if you need that object as part of the state of the object you are serializing then transient would not be a very good choice. can you please explain this a more? i don't have much idea about object serialization,
and in my upper example, so i can use transient keyword,
those variables are not used to read or write in fileSerialization is used to store objects or "send" them from one place to another using streams.
Transient variables, and hence the object they reference if not primitives, do not become part of that stream.
public class Point {
    private int x;
    private int y;
}Now, in the above example, x and y are part of a Point object's state (a rather important part :). If x and y are made transient then those variables would not become part of the stream. The Point object would not be of much use without those two variables.