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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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Memory Allocation
How can you ensure that the memory allocated by an object is freed?
haribcse
- Mar 23rd, 2009
Garbage collection in Java cannot be forced. JVM will decide when to free memory
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What is the difference between Vector, Array and Arraylist
snehakesri
- Mar 20th, 2009
One more point :Vector defaults to doubling the size of its array, while the ArrayList increases its array size by 50 percent.
Sundeep sharma
- Oct 10th, 2006
In Java, arrays are objects. Arrays can be of primitive data types or reference types.
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What is serialization? Any methods in serialization? What is externalization?
nithui
- Mar 14th, 2009
Serialization is the process of converting an object into a sequence of bits so that it can be stored on a storage medium (such as a file, or a memory buffer) or transmitted across a network conne...
uga durga prasad
- Aug 14th, 2007
Serialization is the process of? storing the state of an object into IO Stream, it is a Marker interface and it will not have any methods in it.
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How will u insert and delete with a single java connection when u have referential integrity?
raghu.emails
- Mar 6th, 2009
You can do both operations with a single Java connection but you need two?seperate statements to execute queries or use stored procedures to execute both queries.
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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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The Separator, Comma is Used to separate package names from subpackages and classes
A) TrueB) FalseExplanation: Comma Separates consecutive identifiers in a variable declaration while the Period . is Used to separate package names from subpackages and classes
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An _________ is a special kind of Java program that is designed to be transmitted over the Internet
A) ViewletB) AppletC) ServletD) Object
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What is difference between string and stringBuffer with example
sankarsansinha
- Feb 5th, 2009
String is immutable
String buffer is mutable
Ex String str = "abc";
str = "new String";
this will create new memory location and stores "new String"
but in String buffer
StringBuffer strBuf = "abc";
strBuf = "new String"
it will overwrite in same memory locationsandesh.giri
- Jun 15th, 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 read only and immutabl...
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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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Printing numbers in spiral shape
I need an algorithm for some program. I'll take some number (say 'n'), then i should print the numbers in spiral shape starting from square(n). Can any one pls help me..Ex: if n=3, it should print like9 8 72 1 63 4 5Thanks in advance
datdo
- Jan 29th, 2009
//spiral//by datdo//translated C codepublic class Spiral {int n =3;public static int SPIRALHEIGHT = n;public static int SPIRALWIDTH = n;public static main(String[] args) { int ...
Gerda
- May 8th, 2008
One of possible solutions:public class NumberSpiralShape { /*** @param args*/public static void main(String[] args) { // TODO Auto-generated method stub int n = 3, i, side = n, x=0, y=0;int tab [...
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What's the difference between forward and sendRedirect?
kamaleshece
- Jan 27th, 2009
Forward will forward the same request where as the send redirect will create another request for the request which it gets.
encrypted.passion
- Jan 6th, 2008
Response.sendRedirect method retains session values.whereasForward method of the RequestDispatcher interface does not provide you this functionality.
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Is it possible to write a try within a try statement
aarthiramky
- Jan 24th, 2009
Yes, it is possible to have try block within another try block.The inner try block is basically to identify any specific exceptions if any in that particular block
satheesh reddy chilumula
- Nov 12th, 2005
Ya,It is possible.
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How does Java handle integer overflows and underflows
It uses those low order bytes of the result that can fit into the size of the type allowed bythe operation.
sandy2789
- Jan 13th, 2009
Difference Between Over Flow & Under Flow (JAVA) over flow = ex : array> [0][1][2][3][4] onl...
Sony V George
- Apr 5th, 2007
In java there is no point of overflow and underflow, it was there in C. For avoiding that java introduces type casting. Java will allow some more space from the defult space of primtive type.
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Java iText
I would like to create a PDF file using java and iText , getting data from the database.I am looking for examples.
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There are 50 reserved keywords currently defined in the Java language
A) TrueB) False
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Java Constructor
How to use a constructor in a Java program?
justjiten
- Dec 4th, 2008
In a Java program constructor is used for object creation.With the help of new operator we create the new object for the class by calling its constructor.
banduskank
- Jun 30th, 2008
When you want create an object at that time you use the constructor. The purpose of Constructor is only to create object. If you not provide Constructor then compiler create default Constructor to create object.
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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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Does Java has pointer?
lincolnkal
- Oct 21st, 2008
Yes, Java definately supports POINTERS . But we are not using them externelly. the Java Runtime Environment (JRE) will take care of it. Generally it always a tough task to use pointers by the users. I...
Java Interview Questions
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