How an Treeset maintains the unique element? Which algorithm does it use?
What is the advantages over doing the same using the Arraylist manually?

Prasad MN

 Profile Answers by Prasad MN Questions by Prasad MN

• Mar 11th, 2013

Tree Set using internally HashTable for storage the objects using of key and values. Internally its using hashing mechanism. It displays the order on Ascending order.

Nikhil

• Feb 20th, 2013

It uses Red-Black tree alogorithm.

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When the Subclass method is called, does the SuperClass constructor execute? If so, which Constructor executes first (Sub Class OR Super Class) for the given below scenarios?
a. Given that we are NOT inheriting SuperClass constructor?
b. Given that we are inheriting SuperClass constructor?

Shrimp

• Apr 1st, 2016

When a sub class method is called from parent class, constructor will be executed dude, constructor only executed when you create an object

Manjunath_7_89

 Profile Answers by Manjunath_7_89 Questions by Manjunath_7_89

• Mar 25th, 2016

Super class constructor could be invoked only when super() is used and it has high priority of invoking, once super class constructor is invoked the setted public/protected variables are inherited in subclass

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santh kumar

 Profile Answers by santh kumar Questions by santh kumar

• Mar 20th, 2007

 it's an additional information to sahoo's answer only. RequestDispacher is an Interface ,it provides two methods.  forward() and include() Precisely to this context, container ...

dile_sahoo

 Profile Answers by dile_sahoo Questions by dile_sahoo

• Mar 17th, 2007

In case of the Dispatching a request we can use the relative path.Incase of Forwarding a request it internally execute the RequestDispathcher.forward() and forward() method cannot be used to dispatch ...

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Sarma

• Dec 1st, 2005

EJB is a Server side resident resource managable, trasactional, persistable, secure, reusable component.

Madhuroopa Soundararajan

• Jul 7th, 2005

Hi, Enterprise Java bean is a server side component. it contains business logic and no system level programming and services like transactions,threading,persistence and security as EJB serve...

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jdemaste

 Profile Answers by jdemaste Questions by jdemaste

• Mar 31st, 2007

If an object X is serialized and you perform modifications then you can ensure that the serialVersionUID  matches the first one and can thereby decieve the JVM. There are limits altering log...

sudheer

• Aug 11th, 2005

No we cannot fool the JVM It willr eject the wrong one by checking class id and definitions 

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Pardeep Saini

• Dec 11th, 2005

Sandbox model is employed in JVM for accessing the applets and it is in the Java Enabled Browser. It is just a security check that an applet can communicate with a single remote computer from which it is downloaded. Then how the memory is provided by Sandbox mechanism.

suken

• Oct 17th, 2005

Memory footprint : is the amount of memory a particular application is using.The JVM keeps a check on this by its sandbox mechanism. The sandbax always has the correct knowledge of the amount of space...

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yashpal

• Sep 19th, 2005

No you cannot start garbage collection by your own.By executing System.gc() you just b sure that GC will b run, but when cannot be told. 

Vijay

• Sep 18th, 2005

Yes, by using System.gc we can implicitly call the garbage collector

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rameshbabukm

• May 26th, 2007

If u r using jsp then ur form should look? like thisand a file upload tagand from the java side use the any open source file reader likeimport org.apache.commons.fileupload.*;which will read the file from http request contentRegardsRamesh

rajjava

 Profile Answers by rajjava Questions by rajjava

• Sep 18th, 2005

<input type=file name=f>

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sujatham

 Profile Answers by sujatham Questions by sujatham

• Aug 10th, 2007

Java has the following disadvantages. Because programs written in Java language runs on a virtual machine, it runs somewhat slowly compared to other programs. However, it is unlikely that it feels ann...

kuriakose

• Sep 30th, 2005

Java language runs on a virtual machine, it runs somewhat slowly compared to other programs.  It is difficult to write a perfect program, especially if it is as big as a virtual machine

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Thirumalai's Answer : Using dnd package. ( I will place a sample code if anybody is intrested )

subramanian_ram

 Profile Answers by subramanian_ram Questions by subramanian_ram

• Jan 16th, 2007

Can u plz provide a sample code. Tx.

saran

• Mar 10th, 2006

Thanks in advance.i want to move a JButton using Mouse in runtime within a JFrame.saran

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neeraj.kaushik285

• Nov 7th, 2007

Set the transaction-type> as 'Bean'Neeraj KaushikSCBCD certified

kris

• Oct 10th, 2006

Set the transaction-type attribute in descriptor to "Bean Managed"kris

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Sarje

 Profile Answers by Sarje Questions by Sarje

• Aug 19th, 2009

immutabe string means once string is created you can not insert or append or remove any character from the string. Since java.lang.String class is immutable thess operations are not allowed in it.muta...

sunil belurgikar

• Sep 29th, 2005

Mutable string means we can append to that string.example StringBuffer object is mutable string.String is immutable objectwhen we declre String="abc"; a string object abc with fixed length is created.We cant add anything to it .If we do java simply creates a new object.

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Niraj

• Nov 19th, 2005

Can I know why it is so

paresh mishra

• Nov 9th, 2005

Diamond problem cant be solved through multiple inheritance thats why java does not support multiple inheritance

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aarbee

 Profile Answers by aarbee Questions by aarbee

• Nov 28th, 2007

Substract the least of start from max of end.  Don't need to do any complex calc.

saikumar

• Nov 29th, 2005

This is great site java devlopers

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shashi123

 Profile Answers by shashi123 Questions by shashi123

• Mar 9th, 2006

Where and when we use abstract class and abstract methods

pulipaka

• Oct 29th, 2005

where and when we use abstract class and abstract methods(this question is asked by tcs).

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Paramesh.A

• Nov 11th, 2005

THERE  IS ONE MAJOR DIFFERENCE IN COMMANDLINE ARGUMENTS  OF JAVA AND C.LET US ASSUME THERE IS AN EXECUTBLE FILE  NAMED"COPY.EXE", WHICH SOURCE CODE IS IN C AND TAKES 2 COMMANDLINE&...

sushi

 Profile Answers by sushi Questions by sushi

• Nov 5th, 2005

Well,command line args in case of java are stringsi.e they are of type strings,this is not the case in c,it is not of type string.

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mandyjoshi

 Profile Answers by mandyjoshi Questions by mandyjoshi

• Nov 11th, 2005

Class 'java.lang.Class' represent classes and interfaces in a running Java application. JVM construct 'Class' object when class in loaded. Even primitive data types have 'Class' object.

Sarva Rayudu

• Oct 31st, 2005

The hierarchy of ClassLoaders is:Bootstrap ClassLoadersExtensive ClassLoadersSystem-classpath ClassLoadersApplication ClassLoaders or (EAR ClassLoaders)EJB ClassLoaders or (JAR ClassLoaders)WARClassLoaders.

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Kapil

• Jan 12th, 2007

Hi Vikram.I feel your answer is absolutely correct. However, could you please elaborate/expand on "How to program the server to either [1] create multiple instances of our servlet class or [2] to serialize the requests made to that particular servlet?"Thanks.Kapil

Vikram

• Nov 23rd, 2005

The Single Thread Model is an interface which is used to indicate that only a single thread will execute the service( ) method of a servlet at a given time. It defines no constants and declares no met...

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Surya Narayan Choudhury

• Jan 26th, 2006

In fact when interupt() is called it set's a flag in the thread class, which can be further checked in the run() method by using isInterupted() meth. Where as join() let the current thread to wait until the thread object on which it called is terminated.

abhishek

• Dec 6th, 2005

Interupt is the method on the thread to distrub or interupt on the other thread which are under execution.Where as the join method is used to say t.join() is to suspend the current thread operation fo...

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Parikshit Chuasma

• Mar 27th, 2006

Well, I think it will be better if a part of request, client itself passes its IP address information to the server. ( I know thereare several issues here ). and secondly, If the client is able to sen...

suresh.bandlamudi

 Profile Answers by suresh.bandlamudi Questions by suresh.bandlamudi

• Mar 11th, 2006

InetAddress localHost = InetAddress.getLocalHost();InetAddress[] all_IPs = InetAddress.getAllByName(localHost.getHostName());for (int i=0; i<all_IPs.length; i++) {     &nbs...

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