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What is the difference between applet and application
paul_jit
- May 13th, 2009
1. An Applet is a Java program running inside a web browser, while a Frame is a kind of window.2. An Applet may open a Frame, or it might just run inside its panel.
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What is the argument type of a program's main() method
A program's main() method takes an argument of the String[] type.
srinugrandhi
- May 14th, 2009
In C and?C++, main() function can take the arguments with type int and char as shown below.void main(int argc,char *argv)In Java main() function take the arguments in String type and the above type is also allowed.
vegetto
- Jun 16th, 2008
you write public static void main(String args[])so the argument type isstring and whatever input you give asjava abs "asd" 1then all the 3 arguments are stored int he corresponding string fo...
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What is finally method in Exceptions
rajesh.manem
- May 14th, 2009
Finally method is executed whether the exception is raised or not and normally used to close the resource that are opened in the before.
pradeep kumar rout
- Sep 29th, 2005
finally method in Exceptions ???? finally not a method in exception
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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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Through the use of inheritance, programmers can reuse the code in the superclass many times.
Skill/Topic: InheritanceA) TrueB) False
Govind Kansara
- May 21st, 2009
Yes, It's true.Through the use of inheritance, programmers can reuse the code in the superclass many times in there Program.
jananianandan
- Feb 20th, 2007
The inheriting helps the programmer to use the variables and methods without rewriting code for them,A child class can use the parents member variables and functions with the help of inheritance.So it is true
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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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To what value is a variable of the String type automatically initialized
The default value of an String type is null.
jigyasa_sienna
- Jun 7th, 2009
Just to reuse the code in a new way. It helps by not making the
correction in the superclass instead of that just simply changing the body of
method without changing the signatures of that method.
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What is Collection and how it supports java?
kritika jha
- Jun 13th, 2009
Collections are objects that hold other objects that are accessed, placed, and maintained under some set of rules.
hariprasad
- Oct 30th, 2006
collection is a group of objects.its an basic interface to all interfaces.under collection set and list are sub interfaces.These 2 interfaces extends collection interface.By using collections we can r...
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What is the difference between Socket and ServerSocket class in java.net package
kritika jha
- Jun 13th, 2009
Socket class is meant for client side, so in a client side you need to make a object of Socket class for any networking application, whereasFor server side networking application ServerSocket clas...
dinesh_greekinterview
- Feb 20th, 2007
difference b/w ServerSocket and Socket :ServerSocket : &n...
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Run Time Exceptions
What do exception mean in java ? what type of run time exceptions?
sanjusr25
- Jun 13th, 2009
Exception means an unwanted condition occur during the excecution of a program.Exception are of two type 1) Checked Exception2) Unchecked Exception Checked exception are those exception which can be...
ranaraj
- Dec 3rd, 2008
List of error exceptions are1).arithmetic Exception2).arrayindexoutofbounds?Exception3).arraystore?Exception4).filenotfoundException 5).ioException6).nullpointerException7).numberformatException8).outofmemoryException9).securityException10).stackoverflowException11).stringindexoutofboundsException
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Reference Variable Size
What is the size of reference variable?
Sagar Mitkari
- Jun 15th, 2009
Not 8 bits. We never know what is the value of reference variables. But one thing for sure all the reference variables you refer have same value as far as memory allocation issue is concerned....
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Does garbage collection guarantee that a program will not run out of memory
Garbage collection does not guarantee that a program will not run out of memory. It ispossible for programs to use up memory resources faster than they are garbage collected.It is also possible for programs to create objects that are not subject to garbage collection
TestMeUser
- Jun 18th, 2009
Static objects will never be garbage collected. So try using them if you are desperate to write code that way.
dgiscool
- Oct 9th, 2005
The object is eligible for garbage collection only if there is no strong reference to the object. An exception to this is island of references(where all objects point to each other).And you should ne...
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As of now ,what i know abt cloning is that we can make a field to field copy of an object.ie when we clone an object,its state as well as a its behaviour is copied to the cloned object.My question is what is the neccesity of it? cant we create another object of the same class? so how does its different from cloned object (that is creating another object of that class rather than being cloned).is there any security issues coupled with this cloned object? And What is the Concrete purpose of Cloning?
kjwilde
- Jun 23rd, 2009
Creating a new instance of the same class and then being sure to apply all attributes of the original object to the new object would be equivalent to cloning. The clone method takes the legwork out of getting a duplicate of an object.
KV
- Jun 25th, 2005
Cloning is necessary. Suppose one of the instance fields of your class is mutable object... so if you are wrting a accessor (getter) for such a field.. u can not return the field object itself......
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Difference between AWT and Swing compenents
satyamaddukuris
- Jun 24th, 2009
AWT components are heavy weight. Swing components are light weight follows MVC architecture
Radhey Krishna Yadav
- Apr 18th, 2006
awt is not platform independent whereas swing is plateform independent because the resolution of awt is defferent 16-bit computer and 32-bit computer whereas in case of swing resolution is same on dif...
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The finalize() method will always be invoked once before the object is garbagecollected. However, the finalize() method might never be invoked for an object in itslifetime, because there is no guarantee that it will get garbage collected.Then what is the use of the finalize() method? Why should we use it?
chkalyane
- Jul 6th, 2009
Finalize method is used to clean up the unmanaged code. when we use the finalize method that object reference will be placed into the finalize queue. so whenever the memory required the GC will lookinto the finalize queue and corresponding object will be freed.
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Multiple Inheritance
Why multiple inheritance is not applied in Java?
vinodkashyap
- Jul 9th, 2009
Lets take an exampleClass A{ public void clear(){ }}Class A{ public void clear(){ }}Class B extends A{ public void clear(){ }}Class C extends A{ public void clear(){ }}Now If multiple inhertence is al...
rhingarajiya
- Jul 8th, 2009
In Multiple Inheritance, Diamond problem may arise. So Java supports multiple interface inheritance instaed of multiple inheritance.
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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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Java Virtual Functions
How to achieve Virtual Functions in Java?
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What are wrapped classes
Wrapped classes are classes that allow primitive types to be accessed as objects.
Djava
- Aug 10th, 2009
Wrapper Classes are like a wrapper over a resource that is If I have to access a resource I can access it throught that wrapper.For example:'java.lang.Integer' is a wrapper class. with r...
tech.abha
- Feb 3rd, 2009
Wrapper classes are classes that are used to make primitive variables into objects, and to make wrapped objects into primitives. int, boolean, double are all primitive data types and their respective ...
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What is the difference between Iterator and Enumeration? What is the difference between exception and error?What is the difference between final, finally and finalized? What is Synchronisation in threadsWhat is the difference between wait(), join(), sleep(), notify() & notifyall() methods? When should i used notify() and notifyall() methods on threads? thank u sir/mam
svsrinivas
- Aug 10th, 2009
Error comes at compilation time, Exception comes at run time. final keyword is used in three ways final int i=10; This represents i is constant we can't change the value of i; If you used in front...
vinodkashyap
- Jul 9th, 2009
Iterator - Interface to iterate over collectionsEnumertion - Type of collecton of objectsException - Occurs when some logically wrong happens in program. Can be catchedError - Not in hands of develope...
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