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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 systems refer to the roster as the buddy list, contact list, etc.
Roster Entries
Every user in a roster is represented by a RosterEntry, which consists of:
• An XMPP address (e.g. [email protected]).
• A name you've assigned to the user (e.g. "Joe").
• The list of groups in the roster that the entry belongs to. If the roster entry belongs to no groups, it's called an "unfiled entry".
What is the difference among ForwardAction and IncludeAction? Ans) The difference is that you require to use the IncludeAction only if the action is going to be contained by ano
Type casting defines treating a variable of one type as though it is another type. When up casting primitives as given below from left to right, automatic conversion happens. Bu
Project Description: Develop an android service app that will run on the background. The app has to get the users location (longitude and latitude) every 5 minutes or when th
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1. Make a class Rational to provide at least following methos and constructors: Rational r1= new Rational (3,5); Rational r2= new Rational (4,7); Rational r3=r1.add(r2);
what are the advantages of packages and interface? why we use them? and what is the way of using packages and interfaces complete description with examples?
Create a compressed file that contains the eclipse project directory and a short document that describes: the methods implemented any missing or incomplete elements o
solve the string public int expression("10+20+30")
A final class will not be extended i.e. A final method cannot be overridden when its class is added. You can't modify value of a final variable.
Implement the Money class discussed in class. This class should represent a dollar and cents amount with 0-99 cents and the cents being the same sign as the dollars. The class shou
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