Java
Applet
Applet
is a special type of program that is embedded in the webpage to generate the
dynamic content. It runs inside the browser and works at client side.
Advantage of Applet
There
are many advantages of applet. They are as follows:
- It
works at client side so less response time.
- Secured
- It can be executed by browsers running under many plateforms, including Linux, Windows, Mac Os etc.
Drawback of Applet
- Plugin
is required at client browser to execute applet.
 |
| Fig: Applet In java |
Lifecycle of Java Applet
1.
Applet is initialized.
2.
Applet is started.
3.
Applet is painted.
4.
Applet is stopped.
5. Applet is destroyed.
These are method of
life cycle of a java.applet.Applet class
 |
Fig: Lifecycle Of Applet |
For
creating any applet java.applet.Applet class must be inherited. It provides 4
life cycle methods of applet.
1.
public
void init(): is used to initialized the
Applet. It is invoked only once.
2.
public
void start(): is invoked after the init()
method or browser is maximized. It is used to start the Applet.
3.
public
void stop(): is used to stop the Applet. It
is invoked when Applet is stop or browser is minimized.
4.
public
void destroy(): is used to destroy the Applet.
It is invoked only once.
How to run an Applet?
There
are two ways to run an applet
1.
By html file.
2.
By appletViewer tool (for testing
purpose).
Example of Applet by html file:
//First.java
import java.applet.Applet;
import java.awt.Graphics;
public class First extends Applet{
public void paint(Graphics g){
g.drawString("welcome",150,150);
}
}
myapplet.html
<html>
<body>
<applet code="First.class" width="300" height="300">
</applet>
</body>
</html>
Output:
Welcome
Hello, my name is Pramod Dwivedi. I'm a 5 year old self-employed in online business Industry.
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