哪个是用于数字和字符串的正确正则表达式？ [英] Which is the right regular expression to use for Numbers and Strings?

问题描述

我正在尝试创建简单的IDE并根据我的JTextPane着色

I am trying to create simple IDE and coloring my JTextPane based on

• 字符串（）


• 评论（//和/ * * /）


• 关键字（public，int ...）


• 数字（69之类的整数）和浮点数如1.5）

• Strings (" ")
• Comments (// and /* */)
• Keywords (public, int ...)
• Numbers (integers like 69 and floats like 1.5)

我为源代码着色的方法是覆盖StyledDocument中的insertString和removeString方法。

The way i color my source code is by overwritting the insertString and removeString methods inside the StyledDocument.

经过大量测试，我已经完成了评论和关键字。

After much testing, i have completed comments and keywords.

Q1：至于我的字符串着色，我为我的字符串着色基于此正则表达式：

Q1: As for my Strings coloring, I color my strings based on this regular expression:

Pattern strings = Pattern.compile("\"[^\"]*\"");
Matcher matcherS = strings.matcher(text);

while (matcherS.find()) {
    setCharacterAttributes(matcherS.start(), matcherS.end() - matcherS.start(), red, false);
}

这是有效的99％的时间除了我的字符串包含特定类型的字符串的时候代码中的\。这弄乱了我的整个颜色编码。
任何人都可以更正我的正则表达式来修复我的错误吗？

This works 99% of the time except for when my string contains a specific kind of string where there is a "\ inside the code. This messes up my whole color coding. Can anyone correct my regular expression to fix my error?

Q2：对于整数和小数着色，根据这个正则表达式检测数字：

Q2: As for Integers and Decimal coloring, numbers are detected based on this regular expression:

Pattern numbers = Pattern.compile("\\d+");
Matcher matcherN = numbers.matcher(text);
while (matcherN.find()) {
    setCharacterAttributes(matcherN.start(), matcherN.end() - matcherN.start(), magenta, false);
}

通过使用正则表达式\d +，我只处理整数而不是漂浮。此外，作为另一个字符串的一部分的整数是匹配的，这不是我想要的IDE内部。哪个是用于整数颜色编码的正确表达式？

By using the regular expression "\d+", I am only handling integers and not floats. Also, integers that are part of another string are matched which is not what i want inside an IDE. Which is the correct expression to use for integer color coding?

下面是输出的屏幕截图：

Below is a screenshot of the output:

感谢您提前获得任何帮助！

Thank you for any help in advance!

推荐答案

对于字符串，这可能是最快的正则表达式 -

For the strings, this is probably the fastest regex -

\ [^ \ \\\\] *（?: \\\\。[^ \ \\\\] *）* \

格式化：

 " [^"\\]* 
 (?: \\ . [^"\\]* )*
 "

对于整数和十进制数，我所知道的唯一万无一失的表达式是

this -

For integers and decimal numbers, the only foolproof expression I know of is
this -

（？：\\d +（？：\\\\\ *）？| \\。\\\\ +）

格式化：

 (?:
      \d+ 
      (?: \. \d* )?
   |  \. \d+ 
 )

作为旁注，如果您从
的开头独立完成每个字符串，您可能会重叠突出显示。

As a side note, If you're doing each independently from the start of
the string you could be possibly overlapping highlights.

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