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What will happen to the Exception object after exception handling
r.praveenkumar
- Mar 20th, 2008
Exception object can be caught only once after it was caught i think it will be eligible for garbage collection. Not that it will be immediately destroyed but it will be destroyed soon if we are not using that object to detect what kind of exception it is.
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How a class file is loaded to JVM
trinadh
- Mar 19th, 2008
if we use the command some c:java xxx 1. the JVM will be started and it will allocate the memory for holding the information about java classes. this memory are is called "ClassArea".2. The ...
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Can a Byte object be cast to a double value
No, an object cannot be cast to a primitive value.
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Class and Instance Variable
What is the difference between a class variable and an instance variable?
ravi_1229
- Mar 24th, 2008
Instance variables created? per copy. for ex: class A{??? private String instVariable="Hello";??? public static void main(String a[]){??? ?? A obj1=new A();??? ?? A obj2=new A();??...
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Throw and throws
What is the difference between throw and throws
ravi_1229
- Mar 24th, 2008
if user program explicitly wants to throw an exception(inbuilt or userdefined) then throw keyword is used. if the user program wants to throw an exception in a particular condition then throw k...
ravi_1229
- Mar 24th, 2008
if user program explicitly wants to throw an exception(inbuilt or userdefined) then throw keyword is used.if the user program wants to throw an exception in a particular condition then throw key...
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How do you track Ip in Java ?
ravi_1229
- Mar 24th, 2008
try this piece of code: java.net.InetAddress remoteInetAddress = java.net.InetAddress.getByName(request.getRemoteHost()); String client=remoteInetAddress.getHostName(); System.out.print(client);
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Why finalize method in object class is protected ?
vimalraj
- Mar 24th, 2008
The fact that class Object declares a finalize method means that the finalize method for any class can always invoke the finalize method for its superclass. This should always be done, unless it is th...
ravi_1229
- Mar 24th, 2008
Every user defined class extends object class in java . so if the user defined class having some resources to deallocate(such as database connection, file closing, streams closing) the finalize method is overriden in the current class. thats y the finalize method in object class is protected.
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What is the difference between JDK1.4 and JDK1.5
prawintowin
- Mar 26th, 2008
In JDK 1.5 there are many new IO classes, enhanced for loop, autoboxing (i.e., we can directly use the Wrapper classes are primitive data types.) For example,Integer a = 10; where as in JDK 1.4 it is not possible. These are the main differences.Hope I have answered your question.
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What modifiers may be used with top-level class?
A) publicB) abstractC) final. D) all of the above
Brahmaprasad
- Mar 23rd, 2006
All the above
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JIT Compiler and Interpretor in JVM
In Java JVM we have both JIT compiler and interpretor What are the functionalities of both?
Aravinda Rao
- Mar 31st, 2008
Both JIT compiler and Interpretor are used to convert Virtual Machine(VM) instructins into native machine code and VM use this code for Execution.Running the JIT compiled code is...
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Does a class inherit the constructors of its superclass
A class does not inherit constructors from any of its superclasses.
manjunathboya
- Apr 4th, 2008
yes, the super class inherit the construtor. we can call the super class by using the SUPER keyword.
shaik subhani
- Feb 14th, 2008
A super default constructor is automatically available to the subclass , when the subclass object is created. but if you want to access super class parameterized constructors , we must use super keyword.
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Scenarios to Test Sessions
What could be possible scenarios to test sessions in any J2EE based application?
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Nullpointer Exception
What is Nullpointer Exception How it will be reduced
abuthahir.d
- Apr 14th, 2008
There are many reasons to get a Null pointer Exception . Burn it in ur Brain : NullPointerException can occur only on OBJECTS . not primitives.the above said answer holds a good example .Example 2: &n...
shyamgosavi648
- Apr 2nd, 2008
I can give you example if you create string array and you not assing any value for that string object. when you want print this array the JVM give Null pointer Exception
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Fill in the blanks : - What is the mechanisam defind by java for the Resources to be used by only one Thread at a time________________
A) Synchronisation
deepthi.javatest
- Dec 13th, 2006
I gave synchronization but got marked wrongly check different spellings
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Make .exe file
How to make .exe file in Java for desktop application?
AmitPai
- Apr 19th, 2008
Java is a secure programming language!!Its nearly impossible to make .exe files!!
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Examples of final class
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Expression and Boolean Expression
Explain the difference between an expression and boolean expression
mkannanmca86
- Apr 29th, 2008
Every expression have some value after the evavulation. If the resultant value is neither TRUE nor FALSE then it is known as a boolean expression, else if come any other values then it is k...
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What are the methods in Applet
meenama
- Apr 30th, 2008
Apart from init,start,stop and destroy the Applet class has the following methods:1. public void paint(Graphics)2. public void repaint3. public void update(Graphics)4. public void showStatus(String)5. public String getParameter(String)
pradeep kumar rout
- Sep 29th, 2005
init()start()stop()Destroy()
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Is there any heavy weight component in Swings
meenama
- Apr 30th, 2008
A heavyweight component is one that is associated with its own native screen resource (commonly known as a peer). A lightweight component is one that "borrows" the screen resource of a...
vrcgupta_32
- Dec 1st, 2005
Can u tell me what is heavy weight complonents and light weight components
Java Interview Questions
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