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What is Shallow cloning in Java ?
TypeEE
- Feb 11th, 2009
By default, cloning yields a shallow copy. By shallow, we mean the object is copied, but the contained objects are not. What a deep copy does it copy the cloned object, as well as all the objects with...
Naveenjavasun
- Jul 8th, 2008
When we need a copy of the object we go for cloning. When an object is shallow coned the parent object or top level object and its members are duplicated, where as the low level objects are not duplic...
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Every application should have a main() method. Under which class does the main() method comes under?
shouvanik1979
- Mar 31st, 2009
Main() method should be present in the java class which we execute at the command prompt. for example. c:/> java abc where abc is the class which must have a main() method, because JVM calls the main method of this class after it loads all the classes into its memory.
vawani
- Nov 4th, 2008
If you are writing a program in java then you have to put main method in a class, so that class is the owner of main method but since we r declaring it as public it is available to a...
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What is the difference between core java and advanced java
Naveenjavasun
- Jul 8th, 2008
According to sun system there is no corejava and advanced java.only j2se,j2eeNo advanced java is there as per sun micro... Fucking Training centers daivide j2ee into two patrs. Dont tell in interview i Know Advanced Java.
satheeshraja
- Jun 20th, 2008
1. In core Java, we dont have any solutions for dynamic process but still core java is a very efficient for developers and this is the strong basement for applications.2. Advanced Java has complete s...
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Remove() method collection
Which Underlying Collection will provide the remove() method?
rariedel
- May 28th, 2008
Collection is an interface, and whatever class implements the interface must implement the remove() method.This question is not a complete sentence and that makes it kind of difficult to understand the intent and then answer it appropriately.
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Is it possible to serialize a single member in a class?
suppose i have 2 members in my class can i serialize a single member? Is there any way to do that?
ashutoshwithashi
- Feb 13th, 2010
Yes, it is possible to serialize a single member in a class from the externializable interface as we can control the searization process with the and by searilizing the single memer through writeExternal() and readExternal() method we can do it.
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Determining the order of threads
Q.--" I created five(5) thread instances,say "1","2","3","4","5" and start all of them at the same time,one after the other. The priorities for the threads are same.what should be done so that the threads run concurrently in the same order,i.e1,2,3,4,5(Is there any way at all)"?
Vijay
- Jan 10th, 2014
We can do that by using the join. In the second thread run method, we can call the join on first thread object. In the third thread run method, we can call the join on second thread object. Like this ...
mduhan
- Apr 8th, 2013
We have to implement run method to create a thread.We need to make that method synchronized so that only one thread can go inside and control will be given to second only and only of first is completed.
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Why we are using OOPS?
sivapurammani
- Dec 16th, 2013
Before introducing OOPS some other concepts are also introduced into the computer world, for example Procedure Oriented Language(The best example for this is C language) but these concepts are working...
mukesh jha
- Aug 8th, 2013
OOPS ?stands for object oriented programming . They are ? 1. Abstraction 2. Encapsulation 3. Inheritance 4. Polymorphism Abstraction is representation of ?some property without giving backgroun...
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What is the difference between inheritance and extends?
I have not mistaken extends for polymorphism or encapsulation or anything else.. my question is correct!!!
ANKIT SHARMA
- Feb 14th, 2016
In Inheritance the object aquires all the properties & behaviour of parent object
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How can we restrict class to be inherited?
kamal
- Jan 2nd, 2012
Use the final key word to do this
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Explain the keywords - native, transient, volatile, finally
vinaymudgil007
- Jun 2nd, 2008
Native :- Specifies that the code that should be implemented is writtern in a language other than JAVATransient :- Specifies that the associated variable should NOT be serializedVolatile :- directs th...
Siva Prasad Ashwini
- Oct 17th, 2005
native:when you want to get functionality from particular language like c/c++ native is usedTransient : it is state of which value doesnt persist volatile : is an indication to the compiler that ...
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Why multiple inheritance using classes is disadvantage in java
sampra
- Mar 13th, 2012
Java is build based on concept of no multiple inher to avoid memory usage and ambiguity too
A.Bava Bahrudeen
- Sep 17th, 2011
Multiple inheritance does not support in java. Because, ambiguity has been involved in the multiple inheritance in C++ language. That means, a class access the same properties of more than one class....
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What is the basic difference between Java and .Net
akhilmisra
- Feb 8th, 2009
JAVA is platform independent while .Net works only for the MS platforms. .Net supports an array of languages while for working with J2EE you have only one option and that is 'JAVA". .Net work...
krupananda
- Jun 17th, 2008
No thats not true. Java has a byte code editor too.. Refer : http://www.cs.ioc.ee/~ando/jbe/
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How many threads will be created for a java program, when it is compail & run? and what are they?
Plz give answer
Yasin
- Jul 24th, 2007
Only one thread(Main thread) will be created. Below are the total threads running in JVM when run a java program.1. Main Thread2. Javadb Thread3. Break Point Handler Threas4. Finalize thread5. Reference Handler6. Signal Dispatcher7. Step Handler Thread
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How and when to prevent inheritance?
vinaymudgil007
- May 29th, 2008
Two ways: -(1) mark the class as final(2) make its constructor private -- in this case we will also not be able to instantiate a class from any other classany doubts, let me knowVinny
iyck
- Jul 5th, 2006
If we make Final class we cannot extend, also if we make all the constructor private then we cannot extend that class, is this also prevents inheritence?
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1. Can You catch the Error? 2. Difference between compiletime exception and runtime exception?3. How you throw user defined exception?4. How you handle throwable while using exceptions ?5. What are the methods available in Object ?6. Is there any methods available in serialization ?7. How you seralize an Object ?8.How you get the serialized object ? 9. Any methods available in deseralization ?
rammaheswara
- Sep 29th, 2009
Yes, you can catch the Error as it is a subclass of Throwable, but you are not supposed to.For most of the errors like ( out of memry), there is no use of catching the error.MAHES
ambuj
- Jun 28th, 2007
No, because error is not related to ur progamming envirnment through which we can apply our exception handling mecanism. It?occurs only due to operating system failure, System virus affected etc.
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Compare String object with StringBuffer object.
divya_mini4u
- Sep 22nd, 2010
String objects are immutable in the sense once created cannot be changed, whereas StringBuffer object is mutable and can be changed i.e it saves memory space
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Can i expand an interface?
sriharshanamala
- Mar 1st, 2008
Yaa sure an interface can extend another interfacebut it can not implement another interface..
Core Java Interview Questions
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