Programming with Java -- Examples

applets/	applets on web pages
apps/	applications with graphical user interfaces
include/	auxiliary files to adapt make for various platforms
programs/	programs without graphical user interfaces
Introduction
programs/hello	a first program
apps/hello	a first application
applets/hello	a first applet
The Programming Language Java
programs/int/	integer values
Ranges.java	ranges, bit operations
Try.java	dividing by zero, ArithmeticException
Cvt.java	conversions, raising an Exception
programs/float/	floating point values
Ranges.java	ranges, special values
Qgl.java	solves a quadratic equation; conversions, arithmetic
programs/boolean/	conditions
Cvt.java	conversions
programs/wc/	counting characters, package documentation
Wc0.java	base class: processing the command line, designing the methods
Wc1.java	base class: implementing the auxiliary methods
Bc.java	counts bytes
Uc.java	counts characters, UTF8 encoding
Wc.java	counts lines, words, characters, and bytes with selectable encoding; demonstrates command option processing and specialized input streams
programs/char/	characters and strings
Prop.java	properties, emulates printenv
Hi.java	examples of inner classes
Expression.java	evaluates arithmetic expressions; nested and anonymous classes
Expr.java	command line as a Reader, emulates expr
programs/main/	command line processing
programs/cmd/	command line processing examples
Cmd.java	trivial example for flags and options
Cat.java	lists files or standard input; demonstrates working with file names
Wc.java	counts lines, words, characters, and bytes with selectable encoding; demonstrates adapting the Wc classes to CommandLine
Ls.java	lists information about files; demonstrates path operations
programs/sort/	sorting
ShellSort.java	sorts arguments or lines, trivial implementation
Print.java	lists arguments, trivial example for Print and Elements
A.java	sorts arguments, simple example for Sorted, Comparable and Comparer
B.java	sorts lines in ascending or descending order, simple example for Lines
C.java	sorts system properties in ascending or descending order
D.java	sorts system properties in ascending or descending order with a Comparable class
E.java	sorts Float values from input lines in ascending or descending order with a Comparer class AsFloat
applets/thread/	thread status
Ts.java	lists thread status in an applet or an application as diagnostic output
ATs.java	shows thread status in an applet in a text field of the applet demonstration for suitable browsers
programs/thread/	threads
Many.java	many threads list the command line arguments
Randy.java	many threads list the command line arguments but only the last one should write a line feed; demonstrates synchronisation problem
Morse.java	many synchronized threads list the command line arguments and only the last one writes a line feed
Any.java	reader-writer problem: main thread produces command line arguments, several synchronized threads compete to write the output
Consumer.java	reader-writer problem: main thread produces command line arguments, several synchronized threads compete to write the output; demonstrates Semaphore
Philosopher.java	five dining philosphers share five forks for five courses; demonstrates conditional access to semaphores (forks)
Grep.java	scans for command line argument on input lines
GrepAll.java	scans for all command line arguments on one input line; uses instances of Grep as parallel threads connected by pipes
The Abstract Window Toolkit
apps/gui/	simple examples for all visible objects and their events; invoked with awt.main (require JDK >= 1.1)
applets/gui/	the same examples on web pages with awt.LoaderApplet and event display in awt.Listener (require appletviewer or hotjava)
A.java	Button and arranging with a Panel [applet]
B.java	Canvas with mouse events; quit by leaving the drawing area [applet]
C.java	Checkbox connected with CheckboxGroup arranged with Panel; quit by selecting Really and then Quit [applet]
D.java	Choice; quit by selecting Quit [applet]
E.java	Dialog, regular and modal versions [applet]
F.java	FileDialog to load and store files [applet]
G.java	asynchronous display of an image in a Canvas loaded from a local file or from the net; quit by double clicking the image; uses ImageView [applet]
H.java	Label with colors; quit by double clicking Quit [applet]
I.java	List; quit by selecting Really and then double clicking Quit [applet]
J.java	MenuBar and related classes, creates menus from a symbolic description; `_' is replaced by blank, entries with capitals receive shortcuts [applet]
K.java	PopupMenu to color a Label [applet]
L.java	Scrollbar connected to a TextField [applet]
M.java	ScrollPane to show an image with an ImageView; quit by double clicking the image [applet]
N.java	TextArea with changeable attributes [applet]
apps/awt/	package to analyze event handling (requires JDK >= 1.1)
main.java	accepts a class name as argument, loads a Panel or a Frame as an application and .properties files to filter event display
LoaderApplet.java	accepts a class name as class parameter and optionally an applet name as listener parameter, loads a Panel or a Frame as an applet and connects it to the Listener applet (requires appletviewer or hotjava)
Listener.java	class with lots of inner classes to display events; can be used as an applet and accepts parameters to initialize event display
PrintArea.java	TextArea with a thread to emulate a PrintWriter
Event Management
apps/calc/	various calculators as examples for event handling strategies (require JDK >= 1.1)
applets/calc/	the same examples on web pages with awt.LoaderApplet (require appletviewer or hotjava)
Fsa.java	trivial calculator chip as finite state machine
Keyboard.java	configurable keyboard as a new Component
A.java	calculator application with Fsa [applet]
Cpu.jj	calculator chip with javacc
Cpu1.java	Cpu with listing
B.java	calculator application with Cpu, uses standard output
C.java	calculator application with Cpu [applet]
D.java	calculator application with Cpu and Gate connections for listing [applet]
apps/edit/application	framework for multi-document applications (requires JDK >= 1.1)
apps/edit/edit/	multi-document editor (requires JDK >= 1.1.6)
Layout Management
apps/layout/	examples for CardLayout and GridBagLayout (require JDK >= 1.1)
applets/layout/	the same examples on web pages (require JDK >= 1.1)
Cards.java	general Panel with CardLayout [applet]
ConstraintsInspector.java	panel to inspect a GridBagConstraints object [applet]
Grid.java	experiments with GridBagLayout [applet]
Client/Server Programming
programs/tcp/	TCP sockets
Talk.java	line oriented client
Echod.java	echo server
Snoop.java	proxy server for spying
Client.java	multi-threaded client
programs/udp/	UDP sockets
Talk.java	line oriented client, optionally with timeouts
Echod.java	echo server, with super server, timeouts and random errors
programs/web/	simulation of a database connected to the web
applets/web/	query page
Db.java	``database'' with standard i/o and TCP interface
Web.java	simple web server with standard i/o and TCP interface
Query.java	query applet [applet]
programs/rmi/	Remote Method Invocation (requires JDK >= 1.1.4)
timed/	client and server for current time
logd/	client and server for error reports
logd2/	extension; demonstrates object migration
Database Access
programs/jdbc/	examples for Java Database Connectivity
Sql.java	interactive SQL
jdbctest	practice and test application from InterSolv
The Parser Generator JavaCC
programs/javacc/	examples from compiler construction
Calc0.jj	recognition, javacc
Calc1.jj	error handling
Calc2.jj	evaluation
Calc3.jjt	abstract syntax tree, jjtree
Calc4/Calc4.jjt	operator tree
Calc5/Calc5.jjt	infix and interpretation
Calc6/	semantic analysis and interpretation, class hierarchy for Java expressions