OBJECT CLASS

java.awt.Compoent

Everybody Knows abt the answer.Bcz its a very easy
question."Object" class is the super class of each and every
class.Sp by default every class extends the "Object" class

Object

The java.util.Set interface and related implementations dont
support duplicate elements.

in java .util package there is one interface (set interface)
that interface does not allows the duplicate values.that 
interface implementations class are 
hashset,treeset....these classes don't allow the duplicate 
values.

java.util.Set Packages, there is no dulicate elements.Bcoz 
these interfaces doesn't allows the dulicate values or 
elements. For example. HashMap, HashSet, TreeSet and so on.

Which one will not allow duplicates, is it HashMap or 
HashTable? Please explain the corect answer with an 
example. Thanks in advance

HashSet

set wont allow duplicate element all the classes implementin
set interface wont allow for eg HashSet TreeSet
Hash map will allow for two different key u can have same value

the set inteface does'nt allow duplicate 
elements.therefore,the add() method return false if an 
attempt is made to add duplicate elements to a set.

hashset,treeset....these classes don't allow the duplicate 
values.

The following are the attributes of the character that is
part of a Java identifier but not as the first character:

    * it is a letter
    * it is a currency symbol (such as '$')
    * it is a connecting punctuation character (such as '_')
    * it is a digit
    * it is a numeric letter (such as a Roman numeral character)
    * it is a combining mark
    * it is a non-spacing mark

The Second letter may be
    Alphabetic letters - a to z ot A to Z
    Numerals - 0 to 9
    Only special character  $,_  and Euro currency symbols

ans:division by zero

modulus and division

The setEditable( boolean b ) is used to set a TextComponent
to a read-only state

abs() method

abs()

= i.e assignment operator

validate()

card layout is uniq in all other layout managers .
it stores several diff layouts.it is useful to user to
select the optional components  that can be dynamically
enabled or disabled.
 
          we can select the layout managers by clicking the
button and we can move from front and bak through index.

"Java" is supposed to have got its name from one of the
members of the original developer team Kim Polese. But it is
widely believed that Java (originally called "Oak") was
concieved by the original creators at a local coffee bar.

To credit this incident, the creators used a magic number as
a header to all the Java bytecode class file. The number:
0xCAFEBABE

here is a link if u want to know more:
http://en.wikipedia.org/wiki/Class_(file_format)

Hi guys

   This is Muruga from chennai.

I heared new meaning for Java

    J   Just
    A   Another
    V   Virus
    A   Architecture

java is a place where developers used to import coffee 
while developing the language.previously it is named oak

JAVA stands for jamesgosling ,arthur Iknow only two names u
find remaining two answers i dont'kow that

JAVA name was actually given by "james gosling". first they 
decided 2 name as "OAK" but it was cross down by trademark 
lawyer.

appletcontext()method

FileNotFound Exception

The exceptions that can be caught while opening a file are:

1. FileNotFoundException
2. SecurityException

file not found