While defining HashMap why String is used as key value over other object values?

Manish

• Oct 8th, 2015

It is immutable and hashcode of immutable objects has less possibility of hash collisions.

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What are differences between Core Java and Java?

Raviteja alluri

• Oct 19th, 2015

The difference between Core Java and Java is Core Java : It will covers all basic things like OOPS concepts, Exception Handling, Collections, IoStreams etc Java : It will also covers oops concepts an...

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Today we have a special function called Mystique Function.Mystique function for any value x is denoted by H(x). H(x) is defined as the count of positive integers such that (Let k be one of such positive integer)

1) x%k=0

2) for every integer z it satisfies (z^k-z)%k=0.

3) k>1

Now given a value x you need to print the sum of H(2)+H(3)+H(4)..H(x).

Rajesh Swarnkar

• May 8th, 2016

The condition 2 is not very clear.
"for every integer z it satisfies (z^k-z)%k=0"

How would I test the satisfiability against every integer z as they are infinite?

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In the expression String.format("%2d", 5)
what are the things below, be specific. for example, if the thing is an operator, indicate whether it is binary/unary and whether it is arithmetic/logical/relational. If it is a method, indicate whether its static or not

a. String
b. .
c. format()
d. "%2d" and 5

meena

• Feb 16th, 2016

It returns a formatted string with a value of 5.

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Sandeep Kutwal

• Jul 17th, 2005

The painting algorithm takes as input a source image and a list of brush sizes.   sweep algo is that it computes the arrangement of n lines in the plane ... a correct algorithm,

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K Rajesh Achary

• Jul 22nd, 2005

Primary Advantages is, we don't need to add code in Java Class(attribute, Mutator Method[get/set]), Sipmply we can add new attributes by modifying XML files. Eg . ActionForm and DynaActionForm in Struts FrameWork.

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Arundathi

• Jul 1st, 2005

The Hotspot VM is a collection of techniques, the most significant of which is called "adaptive optimization. The original JVMs interpreted bytecodes one at a time. Second-generation JVMs added a...

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Arundathi

• Jul 1st, 2005

An advantage of this scheme is that it can run in small chunks of time closely interwoven with the execution of the program. This characteristic makes it particularly suitable for real-time environmen...

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Give me answer

dilipiyer

 Profile Answers by dilipiyer Questions by dilipiyer

• Jan 28th, 2006

We can use clone() method to create another instance of a singleton class.Example:SingletonObjectClass obj = SingletonObjectClass.createSingletonObject();SingletonObjectClass clone = (SingletonObjectC...

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SrinivasRao

• Jan 17th, 2006

I think this is the one of the way to return two refference fro one ObjectClassA extends from ClassBthenin ClassBwe can write like thisClassB b=new ClassB();this is one andClassA a= new ClassB();this ...

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arun

• Oct 3rd, 2005

for ur answer refer to text books,my question here, are session thread safe??, also execute method of the action class is thread safe??, i mean can multiple request process with in the execute method,.? pls email me to arun_hyd@msn.com

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pawan powar

• Oct 18th, 2005

  In java, we have Sand box Security Model.  Some Features   Structured Memory Access(No Pointer Arithematics)   Type-safe reference casting   Automatic ga...

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pradeepthi

• Sep 30th, 2005

An interface is a specification that exists between software components that specifies a selected means of interaction, by means of properties of other software modules, which abstract and encapsulate...

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

kuriakose

• Oct 1st, 2005

use componentMoved(componentEvent) method by implementing componentListener Interface.

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S.V.Sita Kiran

• Oct 1st, 2005

A class  is declared abstract for extended clarity. If any method in the class is declared abstract then the class has to be declared abstract and the method has to be implemented in the following derived class.

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nakt

• Nov 18th, 2005

See the suns source code .

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Manish sharma

• Nov 25th, 2005

Modal Data is a interface while DefaultModalData is a abstract class which implements ModalData.

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Pl. explain with the e.g.

Anadi Misra

• Nov 13th, 2005

to use jni we need three things one a native library , usually a ".DLL" which is complied in C or C++. a header file for the native library and the java code whre native aPI implementation is called.&...

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sahu

 Profile Answers by sahu Questions by sahu

• Jan 27th, 2006

An enterprise Bean is a body of code with fields and methods to implement modules of business logic. Client programs interact with one or more Beans, and an enterprise Bean can be implemented to inter...

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Navdeep

• Nov 21st, 2005

Array is the collection of Similar data type and has fix size. datatype arrayname[]=new datatype[size];   ordatatype []arrayname=new datatype[size]; eq: int a[]=new int[10];Two Dim Arra...

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