JAVA(KEYWORDS)

-

JAVA

LIST OF JAVA KEYWORDS
        KEYWORD:    PURPOSE    
  • ABSTRACT: It declares that a class or method is abstract
  • ASSERT: Used to specify assertions
  • BOOLEAN: Declares that variable is a Boolean type
  • BREAK: Used to exits a loop before the end of the loop is reached
  • BYTE: Declares that variable is byte type
  • CASE: To represent different conditions in a switch statement  
  • CATCH: Used for handling exceptions
  • CHAR: Declares that variable is a character type  
  • CLASS: Signals the beginning of a class definition 
  • CONST: This keyword is reserved by java but now it is not in use
  • CONTINUE: Prematurely return to the beginning of a loop 
  • DEFAULT: Default action in a switch statement
  • DO: Begins a do while loop
  • DOUBLE: Declares that variable is a double type
  • ELSE: Signals the code to be executed when if condition executes to false
  • EXTENDS: Specifies the class base from which the correct class is inherited
  • FINAL: Declares that a class may not be extended or that a field or method may not be overridden
  • FINALLY: Declares a block of code guaranteed to be executed
  • FLOAT: Declares a floating point variable
  • FOR: Start a for loop 
  • GOTO: This keyword is reserved by java but now it is not in use
  • IF: Keyword to represent a conditional statement 
  • IMPLEMENTS: Declares that this class implements the given interface
  • IMPORT: Permits access to a class or group of classes in a package
  • INSTANCE OF: Tests whether an object is an instance of a class 
  • INT: Declares an integer variable
  • INTERFACE: Signals the beginning of an interface definition
  • LONG: Declares a long integer variable
  • NATIVE: Declares that a method that is implemented in native code
  • NEW: Allocates memory to an object dynamically
  • PACKAGE: Defines the package to which this source code file belongs
  • PRIVATE: Declares a method or member variable to be private
  • PROTECTED: Declares a class, method or member variable to be protected 
  • PUBLIC: Declares a class, method or member variable to be public
  • RETURN: Return a value from a method
  • SHORT: Declares a short integer variable
  • SUPER: A reference to the parent of the current object
  • SWITCH: Tests for the truth of various possible cases
  • SYNCHRONIZED: Indicates that a section of code is not thread-safe
  • THIS: A reference to the current object
  • THROWS: Declares the exceptions thrown by a method
  • TRANSIENT: Data should not be serialized
  • TRY: Attempt an operation that may throw an exception
  • VOID: Declares that a method does not return a value 
  • VOLATILE: Warns the compiler that a variable change asynchronously
  • WHILE: Begins a while loop
to be continue

Comments

Post a Comment

Popular posts from this blog

AIR POLLUTION IN DELHI

-
Image
The  air quality  in  Delhi , the capital of India, according to a  WHO  survey of 1600 world cities, is the worst of any major city in the world.   Air pollution  in India is estimated to kill 1.5 million people every year; it is the fifth largest killer in India. India has the world's highest death rate from  chronic respiratory diseases  and  asthma , according to the WHO. In Delhi, poor quality air irreversibly damages the lungs of 2.2 million or 50 percent of all children. Causes of poor air quality Motor vehicle emissions  are one of the causes of poor air quality. The  Badarpur Thermal Power Station , a coal-fired power plant built in 1973, is another major source of air pollution in Delhi. Despite producing less than 8% of the city's electric power, it produces 80 to 90% of the  particulate matter  pollution from the electric power sector in Delhi.During the  Great smog of Delhi  in N...
Read more

SYSTEM ANALYSIS AND DESIGN

-
SYSTEM ANALYSIS AND DESIGN  The System is a word derived from the Greek word 'Systema' which means an organized relationship  among components. An Information system is an arrangement of people, data, processes, information presentation and information technology that interacts to support and improve day to day operations in business as well as support the problem solving and decision making needs of management and users. DEVELOPMENT OF A SUCCESSFUL SYSTEM   The success of any depends on the approach of building it. If the development approach is right,   the system will work successfully. System Development Life Cycle  SDLC is a standard methodology for the development of an Information System. it mainly consists of  four phases: System Analysis, System Design, System Construction & Implementation, System Support. every phase consists of input, tasks and outputs. System Development Life Cycle .................
Read more

Why do we cry while chopping the onions?

-
Image
  Why do we cry while chopping the onions? Ever cut of an onion and started tearing up? Most people do. It turns out when you cut an onion, it releases a gas called,  Propanethiol S-oxide. When mixed with certain enzymes in the onion, it creates a sulfur gas. These gases then get to your eyes and create a mild acid which irritates the eyes. Normally, your body would signal you to close your eyes. This, of course, is not a good idea if you are cutting an onion. The next best thing your eyes can do is to make tears to protect the eyes. Rubbing your eyes is a bad idea, since your hands are likely full of the tear making onion juice. So how do you keep from tearing up? There are many theories out there. I’ve heard some have had luck burning a candle near the chopping site. (Don’t try that without an adult.) Wearing safety goggles, however, should reduce the tears every time. The whole process goes as follows:- Lachrymatory-factor sy...
Read more