Removing all fraction symbols like “¼” and “½” from a string

问题

I need to modify strings similar to "¼ cups of sugar" to "cups of sugar", meaning replacing all fraction symbols with "".

I have referred to this post and managed to remove ¼ using this line:

itemName = itemName.replaceAll("\u00BC", "");

but how do I replace every possible fraction symbol out there?

回答1:

Fraction symbols like ¼ and ½ belong to Unicode Category Number, Other [No]. If you are ok with eliminating all 676 characters in that group, you can use the following regular expression:

itemName = itemName.replaceAll("\\p{No}+", "");

If not, you can always list them explicitly:

// As characters (requires UTF-8 source file encoding)
itemName = itemName.replaceAll("[¼½¾⅐⅑⅒⅓⅔⅕⅖⅗⅘⅙⅚⅛⅜⅝⅞↉]+", "");

// As ranges using unicode escapes
itemName = itemName.replaceAll("[\u00BC-\u00BE\u2150-\u215E\u2189]+", "");

回答2:

You can use below regex to replace all fraction with empty string.

str = str.replaceAll("(([\\xbc-\\xbe])?)", "")

来源：https://stackoverflow.com/questions/43359325/removing-all-fraction-symbols-like-%c2%bc-and-%c2%bd-from-a-string