What could be possible scenarios to test sessions in any J2EE based application?
Latest Answer: You can test whether session is alive or not by using isAlive() method ...
Can you load the server object dynamically? If so what are the 3 major steps involved in it?
is it possible to define final keyword before constructor.if yes then describe?
Latest Answer: generally, final keyword is used when we want not to override the class, or not to over ride the subclass methods, but Constructor have the methods or datamembers to activated when we instantiaed, so, final keyword should not use before constructor.... ...
Can HashMap store null values?If yes, how many?What is singleton class? Give one example.Please describe the difference between 'int' and 'Integer',what is the purpose of 'Integer',
Latest Answer: Map Won't allow duplicates, So It will accept one null value.HashMap map = new HashMap();map.put(null, null);map.put(null, null); map.put(null, null);After adding 3 null key / value pairs. It will show only one null value.int => PrimitiveInteger ...
Name two classes that can store arbitrary number of objects.
Latest Answer: ArrayList and Vector ...
class A { // some code here} class B { // some code here}class Ex {public static void main(string args[]) {A a=new B();B b=new A();a.add();b.add();}Will this program run? Explain the referencing the object
Latest Answer: No it will not compile - as A does not extend B nor vice-versa when you try to assign an object of type B to a reference of type A (and vice-versa) you will get an 'Incompatible type' error message from the compiler! If inheritance were involved ...
We have a small requirement where we need to retrieve the e-mail ids of all the employees in the distributed list using LDAP, can any one give an idea how it can be done?
Latest Answer: Hey did you got answer for your query? i too is in requirement of answer for your query.infact, my requirement is "how to access and display the contacts in a distribution list using java?" ...
Latest Answer: try this piece of code: java.net.InetAddress remoteInetAddress = java.net.InetAddress.getByName(request.getRemoteHost()); String client=remoteInetAddress.getHostName(); System.out.print(client); ...
What is wrong in the following code?pulic synchronized void setXXX(String s){ this.setXXX(s);}public synchronized String getXXX(){...}orpulic synchronized void setXXX(String s){ return (this.getXXX());}
Latest Answer: to create word doc use MIME type "application/msword"ORuse POI ,is an open source apache project to create, read ms office file formati.e .doc, .xls, for more info visit poi . apache . org/ ...
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