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Inner Class
What is Inner Class? What is use of it?
V.Tamizh
- Dec 2nd, 2008
An inner class is a class that is defined inside another class.Inner class is a safety mechanism.Inner class is hidden from other classes in its outer class.Inner class can access the members of outer...
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Java Persistance API
What is JPA, can we use JPA without hibernate (hibernate3.jar)? Explain with samples?
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Conditional Statements
What are Conditional Statements?
richakharya
- Feb 5th, 2009
The statements which are executable only when it satisfies a particular condition ?example:if(some condition) ? {? ? ? ? // some statement ?}switch (input){case 1:case 2://default:}
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Run Servlets
How to run Servlets in Tomcat 5.3?
niehongchao
- Mar 6th, 2009
Configure the web.xml file and deploy the Servlet into WebApps dir of TOMCAT.
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Deamon Threads
What is deamon thread?
malayarasanm
- Mar 24th, 2009
Deamon thread is system level thread. You can create this thread. It will manage the user level threads.
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Implement ArrayList
How do you implement ArrayList without using Collections in Java?
kneebrains
- Oct 30th, 2009
def size=10def loadfactor=0.75def myarray = Object[size]def cursor=0def threshold = (int)(size * loadfactor)def add(obj) if cursor < threshold ...
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Pass values from HTML page to the Servlet
How to pass values from HTML page to the Servlet?
anithananduri
- Apr 8th, 2009
we can pass html data to servlet using getParameter() method for example in doPost(......public void doPost(HttpServletRequest request, HttpServletResponse response) throw...
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Stopping Threads
How one thread can be stopped without coming out from the main programme?
anithananduri
- Apr 8th, 2009
We can suspend thread execution for a particular period of time by using sleep() method If we want to stop 1 thread execution until another thread execution is completed join() method is used By ...
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AWT Package
What are the Limitations of AWT package?
VenkitaKrishnan
- Apr 20th, 2009
a) Swings has much richer controls than AWT b) They are 100% java and do not depend on the Peer Classes. Hence light weight c) You can use the Look and Feel using swing d) Icons ...
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Thread Disadvantages
What are the disadvantages of using thread?
r.praveenkumar
- Apr 12th, 2009
while using threads, each thread has access to object's instance variable. so while one thread is making changes to that instance variable, another thread may access it. It results in inconsistenc...
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Subclass Frame
Why we prefer a subclass of Frame over an instance of Frame when we creating a window?
VenkitaKrishnan
- Apr 20th, 2009
One important reason would be to override the existing paint method which will work only if we subclass Frame and not create an instance of the frame.However since extends is such a premium in java, we should not waste it by simply subclassing Frame but use it for much more important purpose.
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Event Adapters
What are event adapters & How they are used?
anithananduri
- Jul 22nd, 2009
Adapter classes help us in avoiding the implementation of the empty method bodies. Generally an adapter class is there for each listener interface having more than one method.these adapter classes have overridden methods for all events.
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Bytecode to Sourcecode
How to convert bytecode to sourcecode?
Sandhya.Kishan
- Aug 1st, 2012
A Java Decompiler (JD) can convert back the Bytecode (the .class file) into the source code (the .java file).
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ArrayList to Array
How will you convert an ArrayList to an Array?
inthiyaj
- May 19th, 2009
In ArrayList we have toArray() method which returns Object[]. by using this we can convert arrayList to Array. In the same way In Array we have asList(T... a) to convert Array to List.
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Serialization
Serialization ignores static variable and transient variables. Why?
meravi84
- May 22nd, 2009
Serialization is a techniques which maintain the state of the object and static variables are class variable, they do not define the state of an object. so serialization ignore this.Transient variable...
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Java Virtual Functions
How to achieve Virtual Functions in Java?
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Garbage Collection Algorithm
What algorithm is used in garbage collection?
Sandhya.Kishan
- Aug 1st, 2012
The algorithms used by garbage collectors are
1.Na?ve mark-and-sweep
2.Tri-color marking -
Override Final Method
How to override final method?
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Struts Advantage
What is the advantage of using struts?
yogesh249
- Jan 27th, 2010
The main advantage of using Struts is that MVC architecture is followed.All the layers, presenation, business and Data access layers are seperated and Web-designer can work independently of the programmer and programmer need not have the knowledge of the designing part.
Java Interview Questions
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