com.youta8.frame.common.util.StringPool Maven / Gradle / Ivy
/*
* Copyright (c) 2011-2020, baomidou ([email protected]).
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.youta8.frame.common.util;
/**
* Copy to 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: https://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 = "$";
String DOT = ".";
String DOTDOT = "..";
String DOT_CLASS = ".class";
String DOT_JAVA = ".java";
String DOT_XML = ".xml";
String EMPTY = "";
String EQUALS = "=";
String FALSE = "false";
String SLASH = "/";
String HASH = "#";
String HAT = "^";
String LEFT_BRACE = "{";
String LEFT_BRACKET = "(";
String LEFT_CHEV = "<";
String DOT_NEWLINE = ",\n";
String NEWLINE = "\n";
String N = "n";
String NO = "no";
String NULL = "null";
String OFF = "off";
String ON = "on";
String PERCENT = "%";
String PIPE = "|";
String PLUS = "+";
String QUESTION_MARK = "?";
String EXCLAMATION_MARK = "!";
String QUOTE = "\"";
String RETURN = "\r";
String TAB = "\t";
String RIGHT_BRACE = "}";
String RIGHT_BRACKET = ")";
String RIGHT_CHEV = ">";
String SEMICOLON = ";";
String SINGLE_QUOTE = "'";
String BACKTICK = "`";
String SPACE = " ";
String TILDA = "~";
String LEFT_SQ_BRACKET = "[";
String RIGHT_SQ_BRACKET = "]";
String TRUE = "true";
String UNDERSCORE = "_";
String UTF_8 = "UTF-8";
String US_ASCII = "US-ASCII";
String ISO_8859_1 = "ISO-8859-1";
String Y = "y";
String YES = "yes";
String ONE = "1";
String ZERO = "0";
String DOLLAR_LEFT_BRACE = "${";
String HASH_LEFT_BRACE = "#{";
String CRLF = "\r\n";
String HTML_NBSP = " ";
String HTML_AMP = "&";
String HTML_QUOTE = """;
String HTML_LT = "<";
String HTML_GT = ">";
// ---------------------------------------------------------------- array
String[] EMPTY_ARRAY = new String[0];
byte[] BYTES_NEW_LINE = StringPool.NEWLINE.getBytes();
}