jodd.util.StringPool Maven / Gradle / Ivy
// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
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//
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package jodd.util;
/**
* Pool of String constants to prevent repeating of
* hard-coded String literals in the code.
* Due to fact that these are public static final
* they will be inlined by java compiler and
* reference to this class will be dropped.
* There is no performance gain of using this pool.
* Read: http://java.sun.com/docs/books/jls/third_edition/html/lexical.html#3.10.5
*
* - Literal strings within the same class in the same package represent references to the same
String object.
* - Literal strings within different classes in the same package represent references to the same
String object.
* - Literal strings within different classes in different packages likewise represent references to the same
String object.
* - Strings computed by constant expressions are computed at compile time and then treated as if they were literals.
* - Strings computed by concatenation at run time are newly created and therefore distinct.
*
*/
public interface StringPool {
String AMPERSAND = "&";
String AND = "and";
String AT = "@";
String ASTERISK = "*";
String STAR = ASTERISK;
String BACK_SLASH = "\\";
String COLON = ":";
String COMMA = ",";
String DASH = "-";
String DOLLAR = "$";
String DOT = ".";
String DOTDOT = "..";
String EMPTY = "";
String EQUALS = "=";
String FALSE = "false";
String SLASH = "/";
String HASH = "#";
String HAT = "^";
String LEFT_BRACE = "{";
String LEFT_BRACKET = "(";
String LEFT_CHEV = "<";
String NEWLINE = "\n";
String N = "n";
String NO = "no";
String NULL = "null";
String OFF = "off";
String ON = "on";
String PERCENT = "%";
String PIPE = "|";
String PLUS = "+";
String QUESTION_MARK = "?";
String EXCLAMATION_MARK = "!";
String QUOTE = "\"";
String RETURN = "\r";
String TAB = "\t";
String RIGHT_BRACE = "}";
String RIGHT_BRACKET = ")";
String RIGHT_CHEV = ">";
String SEMICOLON = ";";
String SINGLE_QUOTE = "'";
String BACKTICK = "`";
String SPACE = " ";
String TILDA = "~";
String LEFT_SQ_BRACKET = "[";
String RIGHT_SQ_BRACKET = "]";
String TRUE = "true";
String UNDERSCORE = "_";
String Y = "y";
String YES = "yes";
String ONE = "1";
String ZERO = "0";
String CRLF = "\r\n";
// ---------------------------------------------------------------- array
String[] EMPTY_ARRAY = new String[0];
byte[] BYTES_NEW_LINE = "\n".getBytes();
}