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Symbols
- (minus)
in command-line options, 26 operator, 56
in permissions, 11
in regular expressions, 43
in shell pattern matching, 14
-- (double minus)
in command-line options, 26 operator, 56
-= operator, 56
_ (underscore) in filenames, 10
: (colon)
in classpath, 24, 107, 119
in shell pattern matching, 14 in vi, 37, 43–45
! (exclamation mark) operator, 56
in shell pattern matching, 14
!= operator, 56
? (question mark)
as command-line option, 29
in shell pattern matching, 14, 196
in SQL, 333
in URLs, 406, 412
?: operator, 56
/ (forward slash)
as file separator, 107
in HTML/XML, 221–222, 433
operator, 56
// comments, 66
/* ... */ comments, 66, 128
/** ... */ comments, 128
/= operator, 56
. (dot)
as current working directory, 12, 20, 24, 29,
121, 238
in filenames, 10
in regular expressions, 43
.. (dot-dot) parent directory, 12
... (ellipsis) in method declarations, 82
^ (hat)
for the Control key, 18 operator, 56
in regular expressions, 43
in shell pattern matching, 14
^= operator, 56
~ operator, 56
' (single quote)
for literals in SQL, 333
in shell pattern matching, 15
" (double quote)
for Strings in Java, 60, 333
in shell pattern matching, 15, 108
[] (square brackets) array operator, 55–56
in regular expressions, 43
in shell pattern matching, 14
{} (braces)
array operator, 55
for compound statements, 66–70 in Javadoc comments, 130
in shell pattern matching, 108
@ (at), 181
in command-line options, 117, 123 in Javadoc comments, 128
549
$ (dollar)
in format fields, 81
in regular expressions, 43
in shell pattern matching, 15, 22
$$ environment variable, 108
* (asterisk)
in import statements, 85–86 operator, 56
in password fields, 373 in regular expressions, 43
in shell pattern matching, 13, 16, 113, 196
*= operator, 56
\ (backslash) in shell pattern matching, 15
& (ampersand) operator, 56
in regular expressions, 43 in URLs, 406, 412
&& operator, 56
&= operator, 56
# (hash)
in comments, 196
in properties files, 111
% (per cent) operator, 56
in regular expressions, 43
%= operator, 56
+ (plus)
operator, 56, 60
in permissions, 11
in regular expressions, 43 in URLs, 413
++ operator, 56
+= operator, 56
< (less-than) operator, 56
as redirection command, 6
< ... >
in command-line syntax, 73 in HTML/XML, 221
<? ... ?>, 222
<% ... %>, 426–431, 434
<%! ... %>, 429–430, 434
<%@ ... %>, 431–433
<%= ... %>, 430–431, 434
<< operator, 56
<<= operator, 56
<= operator, 56
> (greater-than) operator, 56
as redirection command, 6
>= operator, 56
>> operator, 56
>>= operator, 56
>>> operator, 56
>>>= operator, 56
= operator, 56
== operator, 56, 61, 91
| operator, 56, 391
|= operator, 56
|| operator, 56
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