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What is an Iterator?
Some of the collection classes give traversal of their contents via a java.util.Iterator interface. This interface permits you to walk through a collection of objects, operating on every object in turn.
Remember when using Iterators that they have a snapshot of the collection at the time the Iterator was obtained; generally it is not advisable to modify the collection itself whereas traversing an Iterator.
What are the different messaging paradigms JMS supports? Ans) Publish and Subscribe i.e. pub/suc and Point to Point i.e. p2p.
Implicit objects are formed by the web container and have information related to a particular request, page, or application. They are request, response, pageContext, session, appli
Explain Data Updates issues in data management? DATA UPDATES: Old titles must be removed regularly Data changes every time Prices change Transportation / shipping cost change
The roster lets you keep track of the availability ("presence") of other users. A roster also allows you to organize users into groups such as "Friends" and "Co-workers". Other IM
State about the performance of java First versions of java were pretty slow. Java performance has gotten a lot better with aggressive just-in-time-compiler (JIT) techniques
write code employe managment
JAVA Programming
create and initialize the two dimensional array called table Numbers of type integer. use nested loops that will add 12 to each element in an array. use nested loops that will get
Separating your business logic with other functionality such as services, Loggers etc, making classess more cohesive.
The confidentiality and privacy may be accomplished through encryption. Encryption may be: Private-key or symmetric: This is based on a single key. This needs the sender and the
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