Gui in java

GUI in Java
HALDIA INSTITUTE OF TECHNOLOGY
A presentation on
Presented by: GAURAV RAJ
Roll no: 14/CS/33
Date: 02/03/2017

 GUI is an abbreviation for Graphical User
Interface.
 It is an interface that allows user to communicate
with programs through graphical icons with
some visual effects.
 It is helpful in getting rid of those text-based
interfaces used to perform various tasks.
Definition

An example of text-based interface An example of GUI
• Choosing Windows over other operating systems is
a result of better GUI provided by the respective
company.
Text – based interface Vs GUI

Terms in GUI
 User interface components
 Content Pane
 Frame
 Layout Manager
 Panel
 Event - Driven programming

Layout Manager
Flow Layout Border Layout Grid layout
 Flow Layout: The position of components depends on dimensions of the
content pane.
 Border Layout: Directions like north, south, west and east as well as center
are used to position various components on a pane.
 Grid Layout: ‘m’ number of components are divided into ‘n’ number of rows
making their positions fixed till there is no change in ‘m’ or ‘n’.

The position of components will
change on any change in dimensions
of the frame
Here positions of components are
fixed in various directions and at
center.
Here 6 components (3 labels and 3 text-
fields) are divided into 3 rows and 2
columns thus making their positions
fixed.

Various components
Frame Buttons
Panel 1
Panel 2
Button
Panel
Label
Text Field

Graphics
 Whenever a component is added to a frame, an instance of
‘Graphics’ class is automatically created.
 It is the graphics object that invokes paintComponent( ) method to
draw the components on the panel.
 A graphics object is like a pencil or a paintbrush which is
responsible for drawing.
Event – Driven Programming
 Actions to be taken after clicking a mouse button, pressing a
keyboard button, or dragging a mouse come under this category.
 There are various interfaces known as listeners defined for various
button operations.
 Implementation of these listeners decides actions to be taken on
those button operations.

Conclusion
 Definition of GUI
 Applications of GUI
 Various components of GUI
 Various terminologies
 Graphics & Event – Driven programming

Gui in java

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Gui in java