Thursday, April 21, 2011

The char data type in Java

A char is a single character, that is a letter, a digit, a punctuation mark, a tab, a space or something similar. A char literal is a single one character enclosed in single quote marks like this
char myCharacter = 'g';
Some characters are hard to type. For these Java provides escape sequences. This is a backslash followed by an alphanumeric code. For instance '\n' is the newline character. '\t' is the tab character. '\\' is the backslash itself. The following escape sequences are defined:
\b backspace
\t tab
\n linefeed
\f formfeed
\r carriage return
\" double quote, "
\' single quote, '
\\ backslash, \
The double quote escape sequence is used mainly inside strings where it would otherwise terminate the string. For instance
System.out.println("And then Jim said, \"Who's at the door?\"");
It isn't necessary to escape the double quote inside single quotes. The following line is legal in Java
char doublequote = '"';

Further java also supports Unicode Characters.

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