How many ways one can create an instance of a class?

Nitin Vavdiya

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• Jan 30th, 2012

There are four different ways (I really dont know is there a fifth way to do this) to create objects in java: 1. Using new keyword This is the most common way to create an object in java. I read s...

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What are the byte values of datatypes?

Sandhya.Kishan

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• Aug 1st, 2012

The default byte value of data types in zero.

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Can a private/protected class be inherited? Explain

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Aug 1st, 2012

Yes, but they are not accessible. Although they are not visible or accessible via the class interface, they are inherited.

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How does Java program compile and execute to give output?

manoj.arah

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• Aug 20th, 2013

The Java platform consists of the Java application programming interfaces (APIs) and the Java 1 virtual machine (JVM). Java APIs are libraries of compiled code that you can use in your programs. They...

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Why we are using by implementing the runnable interface rather than we have the run() method in Thread class?

pdommara

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• Sep 28th, 2010

Hi, Is the question  : Why we are going to Runnable interface  when you have Thread class ?.  Then every java  basic developer  should know that  " Java  does n...

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What is difference between Core Java and Advance Java?

sapanindia

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• Aug 17th, 2010

The fundamentals conepts of java which deals basically with OOPs concepts and their implementation in language can called core java1. Other word is called java application2. Core Java is stand alone a...

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What are the different ways to read input from keyboard at run time?

Sandhya.Kishan

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• Aug 1st, 2012

By using scanner class we can input data from the keyboard.By declaring the Scanner classs input as System.in, it pulls data from the keyboard (default system input).

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How can we call a constructor through another constructor in the same class?

chetan.nellekeri

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• Aug 25th, 2010

There is no way to invoke a constructor explicitly.Respective constructor is invoked only at the creation of object.For Ex: Hello h=new Hello(); // This will invoke default constructor if exists Hello...

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What are the 4 stages of garbage collector? How and when Garbage collector comes into picture? What is the importance of finalize method?

KP

• Aug 17th, 2011

Stage 0
stage1
stage2
stage3

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How to convert list object in to map object?

sree

• Nov 6th, 2012

List list;
Map map = new HashMap();
for (Item i : list) map.put(i.getKey(),i);

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What are the different types of methods and their use in Java?

Nitin Vavdiya

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• Jan 30th, 2012

Void sample()
returntype sample()
void sample(argument list)
returntype sample(argument list)

all above method can be abstract!!!

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What is the default size of Vector

yogesh249

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• Oct 26th, 2010

Default size of vector is 10.Source:?http://download.oracle.com/javase/1.4.2/docs/api/java/util/Vector.html

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How to compress a String (algorithem)?

Sandhya.Kishan

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• Aug 1st, 2012

"java import java.io.ByteArrayOutputStream; java.io.IOException; import java.util.zip.GZIPOutputStream; import java.util.zip.*; public class zipUtil{ public static String compress...

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What is MVC and what are its advantages?

Varun Sharma

• Sep 17th, 2011

MVC stands for M- MODEL V- VIEW C- CONTROL.

Its basic advantage is that it's help a programmer to write business logic and designing view coding separately.

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What is the Lifecycle of a Servlet?

invincible_virus

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• Jan 22nd, 2011

The life cycle of a servlet is controlled by the container in which the servlet has been deployed. When a request is mapped to a servlet, the container performs the following steps. Loads the se...

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How to avoid deadlock in Java?

Sandhya.Kishan

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• Aug 1st, 2012

A deadlock occurs when one thread has the control for A and tries to get the control for B while another thread has the control for B and tries to get the control for A. Each will wait forever for the...

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What is a static import? Why it is required?

venkat9060

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• Nov 23rd, 2010

By using the static import we can reduce the code writing   for example     static import java.lang.System     class StaticTest{   &nbs...

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How to find the size of the (datatype) variable in java?in c we use sizeof() operator for for finding size of data type

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Mar 27th, 2012

There is no any particular function in java to find the size of the variable,because java removes the need for an application to know about how much of space needs to be reserved for a primitive value, an object or an array with a given number of elements.

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Please observe the following code....public class MyClass{ public static void main(String[] args) { try{ //code here }catch(Exception e) { System.out.println(e); } }}if the try block throws an ArithmeticException,NullPointerException,etc....we can handle the exception...Because those are the sub classes of Exception class...The Question...

Raghu

• Aug 19th, 2011

An exception type must be subtype of Throwable class.............

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How we implement pagination in j2ee

naveen potla

• Aug 27th, 2011

One way is fetching records from DB is using limit. For example if we have 1000 records to get in our result, you can fetch 100 records each time.

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