The Java EE 5 Tutorial

[ ]

Contains optional arguments and command options.

ls [-l]

The -l option is not required.

{ | }

Contains a set of choices for a required command option.

-d {y|n}

The -d option requires that you use either the y argument or the n argument.

${ }

Indicates a variable reference.

${com.sun.javaRoot}

References the value of the com.sun.javaRoot variable.

-

Joins simultaneous multiple keystrokes.

Control-A

Press the Control key while you press the A key.

+

Joins consecutive multiple keystrokes.

Ctrl+A+N

Press the Control key, release it, and then press the subsequent keys.

→

Indicates menu item selection in a graphical user interface.

File → New → Templates

From the File menu, choose New. From the New submenu, choose Templates.