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Volatile Modifier
What is volatile modifier in Java? How it is useful?
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Anonymous Class
What is anonymous class? What is its use in Java?
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What is the role of extends in java?
Explain with an example how do you use extends in java
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What is the difference between a static and a non-static inner class
A non-static inner class may have object instances that are associated with instances ofthe class's outer class. A static inner class does not have any object instances.
dapatel
- Jul 4th, 2011
A non-static inner class may have object instances that are associated with instances of the class's outer class. A static inner class does not have any object instances.
Dhananjay Singh
- Sep 12th, 2005
The static inner classes can be accessed with out creating it's objects or we can access static inner classes with direct class name but in the case of non-static inner classes access we have to create the object of that class.
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What is the difference between a while statement and a do statement
A while statement checks at the beginning of a loop to see whether the next loop iterationshould occur. A do statement checks at the end of a loop to see whether the next iterationof a loop should occur. The do statement will always execute the body of a loop at leastonce.
jackshon9
- Jun 27th, 2011
In While loop first condition will be checked and if it is true then code inside condition will performed. While in Do..While loop first code is performed one time afterwords condition will checked.
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What is the diffrence between an Abstract class and Interface
Sujit4175
- Jun 23rd, 2011
As far as difference is concerned, then the only difference between interface and Abstract class is:?In the interface we can only declare a method, we can not define it within interfaceBut in the abs...
Vijay Chaudhary
- Jul 31st, 2005
Variables declared in Interface are static and final by default.
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Which Collection class is used for FIFO in Java
Guest
- Mar 21st, 2005
Java.util.Concurrent ( Queues)
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What is the difference between final, finally and finalized
kgopalakrishna
- Jun 9th, 2011
Final:final is the constant ;finally:'finally is the key word.this is is ?finally block is doing free from errors.?
jagadish kumar ch.
- Jul 13th, 2005
final is used for declaring a variable as a constant, final class can't be inherited, final methods cannot be overloaded but overridden finally statement should execute not depending upon ...
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What is the difference between Abstract class and Interface
Answered by Scott on 2005-05-12 10:03:06: An abstract class can contain non-abstract methods which do not have to be overridden in the subclass. There is no difference between a fully abstract class (all methods declared as abstract and all fields are public static final) and an interface.
harihb
- Jun 2nd, 2011
Versioning and default functionality.Let's say that you have an abstract class called Human with a functionality walk(). Person A, B that extends abstract class gets the default functionality '...
purva15
- Sep 24th, 2009
A abstract class define both abstract and non abstract methods but interface can have only abstract methods.
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Use of static,final variable
Mohan Raja Gadikota
- May 31st, 2011
Static : Move the variable/methods/class during HDD to RAM. ie; they are available without instantiating the class, by creating an object of that class nd access its methods,members.Final : for Preventing the inheritance further ie; the class with final word as prefix cannot be extend further!
muralidhar.9e
- Nov 23rd, 2010
static variable allocates the memory as globally.It won't reallocate the memory while running.It initializes the memory for the variable only once.final variable tells the variable is final means ...
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WHAT IS THE DIFFERENCE BETWEEN MULTI-THREADING AND MULTI-PROCESSING?
kazi_latiful
- May 23rd, 2011
Multi processing is term that multi program can execute with multi processor that can share the same physical memory space.on the other hand multi-threading is that different program can execute on different time on simultaneously that can share same memory address space.
Vara Rama Krishna Chadaram
- Aug 7th, 2006
MULTI-THREADING :
It refers to the ability of the operating system to execute multiple parts of a process simultaneousliy.
MULTI-PROCESSING:
It refers to the ability of the operating system to execute multiple programs simultameously .The process time is shared between the programs.
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What is the differance between equals() method and ==
Balrog
- Jan 31st, 2007
Your'e WRONG!!
String s1 = "hello";
String s2 = "hello";
is s1 === s2? TRUE
This is because SAME literals have the same reference in memory!!!
Don't post incorrect response.sitaram81581
- May 22nd, 2006
The operator '==' checks whether or not two variables ( both primitive like 'int' variable and reference variables like 'String' variable) contain same data. In case of objects, reference variables co...
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What is the difference between a MenuItem and a CheckboxMenuItem
The CheckboxMenuItem class extends the MenuItem class to support a menu item thatmay be checked or unchecked.
Ashwinshenoy7
- May 9th, 2011
For understanding purpose,Menu Item and check box menu items could be considered as classes.Menu item is a parent class, check box menu item is a sub class(child class) that inherits from the menu ite...
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What is the difference between string and string buffer?
Tarun Wadhwa
- Sep 8th, 2008
Strings are immutable objects means you cannot modify the instance. For example when you create one instance of string and you are changing the value of string, it does not mean that you are changing ...
srinivaspulla
- Sep 7th, 2008
Java provides the StringBuffer and String classes, and the String class is used to manipulate character strings that cannot be changed. Simply stated, objects of type String are ...
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Primitive Types
What happens when you add a primitive type (e.g. double) value to a collection?
pdureja
- Apr 6th, 2011
Collection can hold Objects but not primitives. Prior to Java5, we need to wrap primitive using wrapper classes and in java 5 autoboxing do it automatically.Prior to java 5:xyzCollection.add(new Integer(10))In javaxyzCollection.add(10) //will do autoboxing
mani.sivapuram
- Mar 11th, 2011
Every one says that every concept in Java is purely prepared in Object Oriented Form only in you need to remember one thing when Java people preparing the Java they try to create an alter native t...
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What is the difference between throw and throws
Ahmed Safwat
- Apr 4th, 2011
form practicing java point of view , here is in brief what is the differenceyou have function that do a mathematical division and may be a a division by zero exception raises up, so you need to tell a...
Kulwant
- Sep 12th, 2005
throw is used to explicitly thorw some exception throws is used to tell the compiler the this method might through mentioned type of exception.
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Import javax.swing.*;Here what is the meaning of *?
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What is the purpose of finalization
The purpose of finalization is to give an unreachable object the opportunity to performany cleanup processing before the object is garbage collected.
lwpro2
- Mar 13th, 2011
Actually in addtion to perform some clean up process, it can also be used to bring this object to life, by making it accessible again.
sagar.singh
- Aug 23rd, 2007
Java provides a method called finalize( ) that you can define for your class. Heres how its supposed to work. When the garbage collector is ready to release the storage used for your object, it ...
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