[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] . (dot) commands, formatting control with "glue" files "Know all about Java?" "non-validating" parsers, XML # or !, beginning comment lines in properties file $ (dollar sign) end-of-line regex pattern matching format codes, use in % (percent sign), use in format codes < and > (angle brackets) > (greater than) operator < (less than) operator <? ... ?>, in XML processing instructions around HTML tags around XML tags <applet> tag JAR file attribute on <embed> tag <object> tag ( ) (parentheses), capture groups in regular expressions / (slash) /** (beginning doc comments) * (asterisk), use in regular expressions + (plus sign) ++ (increment) operator += (assignment) operator +? non-greedy regex quantifier +E option, Jikes compiler multiplier or quantifier in regular expressions string concatenation operator +E option, Jikes compiler - (dash) command arguments, use in Unix option delimiter -d (dir) option, javac 2nd -D command-line argument environment variables, getting system-provided properties, retrieving -h (help) command-line argument, checking for -help option, javadoc . (dot) .* in regular expression pattern matching .class keyword / (slash) /**, in Javadoc comments //+ and //- in special Java comments command arguments, use in operating systems, differences in use Unix root directory : (colon) after properties file key names/values differences in use on operating systems = (equal sign) == (equals) operator 2nd after property file key names/values @ (at sign) annotations and in doc comments XDoclet reading of tags in source code \ (backslash) continuing lines with escaping metacharacters in regular expressions operating systems, differences in use root directory, Microsoft platforms string escapes, using in \n (newlines) 2nd making only valid newline sequence in regular expression matching platform-independent code and strings transmitted by server-side sockets, including in \r (carriage return) strings sent across network connections, including in using with \n \r\n (line termination characters) ^ in beginning-of-line regex pattern matching 2nd | (vertical bar), pipeline character 2D graphics drawing text with |