PROGRAMMING WITH JAVA GUI

                                         


Java is a popular third generation programming language.

An event refers to the occurrence of an activity. A message is the information/request sent to the application. A component is an object that defines a screen element such as push button, text field, scrollbar, menu etc. A container control is the one that can hold other controls in it. The holder controls are called child control. 

RAPID APPLICATION DEVELOPMENT(RAD) describes a method of developing software through the use of pre-programmed tools or software.

Java makes available GUI functionality through swing API of JFC(Java Foundation Classes).
Net-Beans IDE is a free, open source Java IDE supported by Sun java.The area on the frame where GUI components are placed is called content pane. Properties are the attributes of graphical control.
Some of the common using graphical controls are frame, label, text area, button. List box, combo box, radio button, check box etc.



Character set is a set of valid character that a language can recognise. Java uses Unicode character.
The smallest individual unit in a program identifiers, literals, punctuators and operators.


keywords is a word carrying special meaning and purpose.

Identifiers are user defined names for different parts of program. In Java, Identifiers can have alphabets, digits, underscore and dollar sign character; must not be keyword or Boolean literals or null literal ; must not begin with a digit ; Can be of any length.

literals are data items that never change their value during a program run.



⇸ What do you understand by Visual programming ?
⇰Visual is a method to create GUI Applications. The visual programming style involves a lot of illustrations like graphic entities, rather than writing numeral lines of code to describe the appearance, functioning etc of the application's interface.

⇸ What is event driven programming ?
⇰This programming style responds to the user events and is driven by the occurrence of user-events.

⇸ What is object oriented programming ?
⇰This programming style emphasizes upon objects, an object is an identifiable entity with some characteristics and behaviour.

⇸ What are keywords ? can keywords be used as identifiers ?
⇰Keywords are the words that convey a special meaning to the language compiler. these are reserved for special purpose and must not be used as normal Identifiers names.



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PROGRAMMING WITH JAVA GUI PROGRAMMING WITH JAVA GUI Reviewed by Rock on July 22, 2019 Rating: 5

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