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• Java applet
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Java applet - Technical information
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Java applets are executed in a sandbox by
most web browsers, preventing them from
accessing local data like clipboard or file
system. The code of the applet is
downloaded from a web server and the
browser either embeds the applet into a
web page or opens a new window
showing the applet's user interface.
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Technical information
A Java applet extends the class
java.applet.Applet, or in the case of a Swing
applet, javax.swing.JApplet. The class must
override methods from the applet class to set
up a user interface inside itself (Applet) is a
descendant of Panel which is a descendant
of Container. As applet inherits from
container, it has largely the same user
interface possibilities as an ordinary Java
application, including regions with user
specific visualization.
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https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Example
The following example is made
simple enough to illustrate the
essential use of Java applets through
its java.applet package. It also uses
classes from the Java Abstract Window
Toolkit (AWT) for producing actual
output (in this case, the "Hello,
world!" message).
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https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Disadvantages
Some browsers, notably mobile browsers
running Apple iOS or Android do not run Java
applets at all.
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https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet
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Java applets were introduced in the first version of
the Java language in 1995.
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet
They are usually written in Java
(programming language)|Java but other
languages such as
Jython,[http://www.jython.org/archive/21/a
pplets/index.html Jython applet page]
JRuby,[http://michal.hantl.cz/ruby-inbrowser-jruby-inside-an-applet/ About Java
applets in Ruby] Scala (programming
language)|Scala or Eiffel (programming
language)|Eiffel (via
SmartEiffel)[http://eiffelzone.com/esd/wrap
j/ A tool to produce Java applets with
SmartEiffel] may be used as well.
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https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet
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Until approximately 2011, Java applets
had been many times faster than
JavaScript.[http://www.timestretch.com
/FractalBenchmark.html An example of
the 2005 year performance
benchmarking] Unlike JavaScript, Java
applets have access to 3D hardware
acceleration, making them well suited
for non-trivial, computation intensive
visualizations
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet
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Since Java's bytecode is cross-platform
(or platform independent), Java applets
can be executed by browsers (or other
client (computing)|clients) for many
platforms, including Microsoft Windows,
FreeBSD, Unix, OS X and Linux. It is also
trivial to run a Java applet as an
application software with very little extra
code so that it can be run directly from
the integrated development environment
(IDE).
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Technical information
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Java applets are executed in a sandbox
(security)|sandbox by most/all web
browsers, preventing them from accessing
local data like clipboard
(software)|clipboard or file system. The
code of the applet is downloaded from a
web server and the browser either
compound document|embeds the applet
into a web page or opens a new window
showing the applet's user interface.
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Technical information
1
A Java applet extends the class , or in
the case of a Swing (Java)|Swing
applet, . The class must override
methods from the applet class to set up
a user interface inside itself (Applet) is
a descendant of which is a descendant
of . As applet inherits from container, it
has largely the same user interface
possibilities as an ordinary Java
application, including regions with user
specific visualization.
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Embedding into a web page
Deprecating applet tag has been
criticized.[
http://mindprod.com/jgloss/applet.html#OB
JECT Criticism] of APPLET tag
deprecation Oracle now provides a
maintained JavaScript code[
http://www.java.com/java/deployJava.txt
Java applet launcher from Oracle - Link
Broken!] to launch applets with cross
platform workarounds.
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https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Example
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Simple applets are shared freely on the
internet for customizing applications that
support plugin (computing)|plugins.For
example, see
[http://en.wikiversity.org/wiki/Java_applets
Java applet section in Wikiversity]
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Advantages
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A Java applet can have any or all of the
following advantages:[
http://download.oracle.com/javase/tutorial/
deployment/applet/index.html Oracle
official] overview on Java applet
technology
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Disadvantages
*Some browsers, notably mobile
browsers running iOS (Apple)|Apple
iOS or Android (Operating
System)|Android do not run Java
applets at all.[
http://www.java.com/en/download/f
aq/java_mobile.xml]
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Java applet - Unsigned
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Communities may solve this problem
via Code review|source code review
or running applets on a dedicated
domain.[http://strategy.wikimedia.or
g/wiki/Proposal:Java_applet_support
Strategy.Wikimedia.org], proposal
with discussion about Java applets in
community
sites[http://Ultrastudio.org
Ultrastudio.org], user editable
educational site with full applet
support
https://store.theartofservice.com/the-java-applet-toolkit.html
Java applet - Alternatives
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Of these, JavaScript is not always viewed as
a competing replacement; JavaScript can
coexist with applets in the same page, assist
in launching applets (for instance, in a
separate frame or providing platform
workarounds) and later be called from the
applet code.[
http://www.rgagnon.com/javadetails/java0170.html Rgagnon.com], calling a Java
applet from JavaScript JavaFX is an
extension of the Java platform and may also
be viewed as an alternative.
https://store.theartofservice.com/the-java-applet-toolkit.html
Comet (programming) - Early Java applets
The ability to embed Java applets into
browsers (starting with Netscape 2.0 in
March
1996http://web.archive.org/web/19961115203
505/www27.netscape.com/comprod/products
/navigator/version_2.0/index.html
Netscape.com from 1996 (via Archive.org))
made real-time communications possible,
using a raw Transmission Control
Protocol|TCP
sockethttp://java.sun.com/j2se/1.4.2/docs/api/
java/net/Socket.html to communicate
between the browser and the server
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https://store.theartofservice.com/the-java-applet-toolkit.html
Applet - Java Applet
Since Java's bytecode is platformindependent, Java applets can be
executed by browsers running under many
platforms, including Microsoft
Windows|Windows, Unix, Mac OS, and
Linux
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https://store.theartofservice.com/the-java-applet-toolkit.html
Applet - Java Applets
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A Java applet contains different security
models: Java_applet#Unsigned|unsigned
Java applet security,
Java_applet#Signed|signed Java applet
security, and Java_applet#Self_signed|self
signed Java applet security.
https://store.theartofservice.com/the-java-applet-toolkit.html
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