Essential Commands	File Management	Java compiler, JVM	Java documentation	Java archives (JAR)	File Transfer Protocol (FTP)	Environment Variables

dir	Lists names of files in current directory (folder)
dir Hello.*	Lists all files whose names start with Hello.
cd C:\files	Changes directory to C:\files ("absolute" pathname)
cd myfiles	Changes directory to myfiles subdirectory of current directory ("relative" pathname)
cd ..	Changes directory to "parent" of current directory
notepad Hello.java	MS-DOS text editor, used to create and edit ASCII textfiles
type Hello.java	Displays contents of ASCII textfile on screen
exit	Ends command interpreter, makes console window go away...

copy Test1.java Test2.java	Copies contents of Test1.java to new file Test2.java
ren Test1.java Test2.java	Renames Test1.java to Test2.java
del Test1.java	Deletes Test1.java (Be careful with this command...)
del Test1.*	Deletes all files with Test1 prefix (Be even more careful with this command...)
mkdir playpen	Creates new directory playpen as subdirectory of current directory
rmdir playpen	Removes directory playpen (must be empty)

Note: if the commands in this table are not recognized by the MS-DOS command interpreter on your system, try using the path commands listed below...

javac Hello.java	Compiles Java source file Hello.java (ASCII textfile), produces bytecode file Hello.class (binary file)
java Hello	"Runs" Java application: starts Java Virtual Machine (interpreter), which executes Java bytecode instructions in file Hello.class

Note: if the commands in this table are not recognized by the MS-DOS command interpreter on your system, try using the path commands listed below...

javadoc Cat	Generates Web document Cat.html, containing description of Cat class. Complete documentation requires inclusion of javadoc comments (/** .. */) in source code.

Note: if the commands in this table are not recognized by the MS-DOS command interpreter on your system, try using the path commands listed below...

jar cf Pets.jar Pets	Creates Pets.jar, containing compressed version of Pets folder and all its contents
jar tf Pets.jar	Displays list of zipped files in Pets.jar
jar xf Pets.jar	Extracts (unzips) entire contents of Pets.jar, preserving any directory structures

ftp ftp.cs.unca.edu	Attempts to start anonymous FTP session on remote Computer Science server. Enter ftp for userid and your bulldog email address for password. Note: Before attempting to upload files, remember to cd to appropriate dropoff directory as shown below.
ftp candler.cs.unca.edu	Attempts to start FTP session on remote Computer Science server candler.cs.unca.edu. You will need to provide your CSCI userid and password for this host. Note: This command connects you to your own home directory, not the site used for making dropoffs.
ftp> ascii	FTP command to set data transfer mode to ASCII (default, suitable for .java source files and other textfiles)
ftp> binary	FTP command to set data transfer mode to binary (suitable for .class files and other binary files)
ftp> status	FTP command to display status, including current data transfer mode (ASCII or binary)
ftp> cd pub/202/fred1234	FTP command to change current directory on remote host
ftp> lcd C:\files	FTP command to change current directory on local system
ftp> put Hello.java	FTP command to copy file Hello.java from current directory on local system to current directory on remote host
ftp> mput *.java	FTP command to copy all files ending with .java from current directory on local system to current directory on remote host
ftp> quit	FTP command to end session, breaks contact with remote host

path	Displays current value of PATH environment variable (list of directories containing DOS command programs)
set path=C:\Program Files\Java\jdk1.5.0_07\bin;%PATH%	Adds named directory (a JDK system directory in this example) to current PATH environment variable (applies only to current session).