If Java does not have pointers then how LinkedList is implemented in Java?

jagadeesh.tel

 Profile Answers by jagadeesh.tel Questions by jagadeesh.tel

• Feb 7th, 2010

In Java everything is handled in objects. It is neither primitive data nor a pointer like in C.With the object reference you can handle everything in the object data. Now coming to the linked lis...

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Write the Java version of MS DOS Copy Command

Sandhya.Kishan

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• Jul 13th, 2012

The command FileUtils.copyFile(fOrig, fDest); is similar to ms ds copy command.

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Which design pattern is used in try catch?

dh_maan

 Profile Answers by dh_maan Questions by dh_maan

• May 24th, 2010

Chain of Responsibility 

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Can we call the main function explicitly? If Yes, How?

Raghunadh Parlapalli

• Feb 13th, 2013

Thats an excellent question. Try this, It works. Because main() is a static method. So, We can call static methods from another class static method. ClassB { public static void main(String[] args) { ...

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Can we represent data in the form of objects in JDBC? Explain

rohitrichhariya

 Profile Answers by rohitrichhariya Questions by rohitrichhariya

• Jul 23rd, 2010

Yes we can.For example you have a table customer make a class Customer and fire query in DB and initialize data member of Customer class with the result of query witch fetch the customer info from db and use Customer class likeString name=Customer.name;

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

Nitin Vavdiya

 Profile Answers by Nitin Vavdiya Questions by Nitin Vavdiya

• 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

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• 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

 Profile Answers by manoj.arah Questions by manoj.arah

• 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

 Profile Answers by pdommara Questions by pdommara

• 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

 Profile Answers by sapanindia Questions by sapanindia

• 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

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• 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

 Profile Answers by chetan.nellekeri Questions by chetan.nellekeri

• 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

 Profile Answers by Nitin Vavdiya Questions by Nitin Vavdiya

• 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

 Profile Answers by yogesh249 Questions by yogesh249

• 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

 Profile Answers by Sandhya.Kishan Questions by Sandhya.Kishan

• 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

 Profile Answers by invincible_virus Questions by invincible_virus

• 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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