Java AWT (Abstract Windowing Toolkit) is an API for developing GUI applications in Java. It contains components like buttons, text fields, labels etc. that are platform-dependent and heavyweight. The AWT hierarchy includes containers like Frame and Panel that can hold other components. Common methods like add(), setSize() and setLayout() are used to manage components. Event handling in AWT involves implementing listener interfaces, registering components with listeners, and placing event code in the same class, a separate class, or anonymously.
ABSTRACT WINDOW TOOLKIT- AWT CONTROL
WINDOW FUNDAMENTALS
WORKING WITH FRAME WINDOW
LAYOUT MANAGERS
DIALOG CLASS
FILE DIALOG CLASS
MENUS AND MENUBAR
HANDLING EVENTS BY EXTENDING COMPONENTS
Applet is the client site designing in Java. To design applet there is a need to use applet api of java. Applet is the class of java applet package. It also uses the AWT api to design the client site. Applet has a life cycle. Applet does not have main function. To run appet we need to write HTML code. We can debug the applet in appletviewer also.
ABSTRACT WINDOW TOOLKIT- AWT CONTROL
WINDOW FUNDAMENTALS
WORKING WITH FRAME WINDOW
LAYOUT MANAGERS
DIALOG CLASS
FILE DIALOG CLASS
MENUS AND MENUBAR
HANDLING EVENTS BY EXTENDING COMPONENTS
Applet is the client site designing in Java. To design applet there is a need to use applet api of java. Applet is the class of java applet package. It also uses the AWT api to design the client site. Applet has a life cycle. Applet does not have main function. To run appet we need to write HTML code. We can debug the applet in appletviewer also.
Java Applet Basics, Important points, Life cycle of an applet, AWT, AWT HIERARCHY, Creating Frame by extending Frame class, Creating Frame by creating instance of Frame class, Java Exceptions, Java try and catch, Syntax, Example for try and catch,
SWTBot is a open source UI testing tool for SWT and Eclipse based applications. It requires bare minimum learning since it is Java based and integrates well with the JUnit framework.
An ideal unit testing tool for SWT and Eclipse based applications developers.
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Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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2. Java AWT
• Java AWT (Abstract Windowing Toolkit) is an API
to develop GUI or window-based application in
java.
• Java AWT components are platform-dependent
i.e. components are displayed according to the
view of operating system.
• AWT is heavyweight i.e. its components uses the
resources of system.
• The java.awt package provides classes for AWT
api such as TextField, Label, TextArea,
RadioButton, CheckBox, Choice, List etc.
4. • Container
• The Container is a component in AWT that can contain another
components like buttons, textfields, labels etc. The classes that extends
Container class are known as container such as Frame, Dialog and Panel.
• Window
• The window is the container that have no borders and menu bars. You
must use frame, dialog or another window for creating a window.
• Panel
• The Panel is the container that doesn't contain title bar and menu bars. It
can have other components like button, textfield etc.
• Frame
• The Frame is the container that contain title bar and can have menu bars.
It can have other components like button, textfield etc.
5. Useful Methods of Component class
Method Description
public void add(Component c) inserts a component on this
component.
public void setSize(int width,int height) sets the size (width and height) of the
component.
public void setLayout(LayoutManager
m)
defines the layout manager for the
component.
public void setVisible(boolean status) changes the visibility of the component,
by default false.
6. Java AWT Example
• To create simple awt example, you need a
frame. There are two ways to create a frame
in AWT.
• By extending Frame class (inheritance)
• By creating the object of Frame class
(association)
7. Simple example of AWT by inheritance
import java.awt.*;
class First extends Frame{
First(){
Button b=new Button("click me");
b.setBounds(30,100,80,30);// setting button position
add(b);//adding button into frame
setSize(300,300);//frame size 300 width and 300 height
setLayout(null);//no layout manager
setVisible(true);//now frame will be visible, by defaul
t not visible
}
public static void main(String args[]){
First f=new First();
}}
8. Simple example of AWT by association
import java.awt.*;
class First2{
First2(){
Frame f=new Frame();
Button b=new Button("click me");
b.setBounds(30,50,80,30);
f.add(b);
f.setSize(300,300);
f.setLayout(null);
f.setVisible(true);
}
public static void main(String args[]){
First2 f=new First2();
}}
9. Event and Listener (Java Event
Handling)
• Changing the state of an object is known as an
event. For example, click on button, dragging
mouse etc.
• The java.awt.event package provides many
event classes and Listener interfaces for event
handling.
11. Steps to perform Event Handling
• Following steps are required to perform event
handling:
1. Implement the Listener interface and
overrides its methods
2. Register the component with the Listener
12. For registering the component with the Listener, many
classes provide the registration methods. For example:
– Button
• public void addActionListener(ActionListener a){}
– MenuItem
• public void addActionListener(ActionListener a){}
– TextField
• public void addActionListener(ActionListener a){}
• public void addTextListener(TextListener a){}
– TextArea
• public void addTextListener(TextListener a){}
– Checkbox
• public void addItemListener(ItemListener a){}
– Choice
• public void addItemListener(ItemListener a){}
– List
• public void addActionListener(ActionListener a){}
• public void addItemListener(ItemListener a){}
13. EventHandling Codes:
• We can put the event handling code into one
of the following places:
1. Same class
2. Other class
3. Anonymous class
14. Example of event handling within class:
import java.awt.*;
import java.awt.event.*;
class AEvent extends Frame implem
ents ActionListener{
TextField tf;
AEvent(){
tf=new TextField();
tf.setBounds(60,50,170,20);
Button b=new Button("click me");
b.setBounds(100,120,80,30);
b.addActionListener(this);
add(b);add(tf);
setSize(300,300);
setLayout(null);
setVisible(true); }
public void actionPerforme
d(ActionEvent e){
tf.setText("Welcome");
}
public static void main(St
ring args[]){
new AEvent();
}
}
15. Example of event handling by Outer class:
import java.awt.*;
import java.awt.even
t.*;
class AEvent2 extend
s Frame{
TextField tf;
AEvent2(){
tf=new TextField();
tf.setBounds(60,50,1
70,20);
Button b=new Button(
"click me");
b.setBounds(100,120,80,30);
Outer o=new Outer(this);
b.addActionListener(o);//passi
ng outer class instance
add(b);add(tf);
setSize(300,300);
setLayout(null);
setVisible(true);
}
public static void main(String
args[]){
new AEvent2(); }
}