JAVA get unit of measure and measurement from a string -

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i have string:

string = "2 ltr. btl., select   varieties when buy 6 $1.25 ea.-50¢  mix or match";

is possible extract unit of measurement given string? (2 ltr)

note: unit of measurement , measurement appear anywhere in string.

edit: 1 of these keywords should appear

oz. oz lbs. lbs lb. lb kg. kg k g. g pk. pk ea. ea ml. ml pck. pck ct. ct qt. qt liter ltr ltr. fl oz fl oz.

i unit of measurement , corresponding measurement.

the regex extract amount (with optional decimal part) , measure unit is:

(?x)\d+(?:\.\d+)?\s+   (?:      (?:fl )?oz(?:\.|\b)|lbs?(?:\.|\b)|kg(?:\.|\b)|kg?\b|g(?:\.|\b)    | pc?k(?:\.|\b)|ea(?:\.|\b)|ml(?:\.|\b)|[cq]t(?:\.|\b)    | liter\b|ltr(?:\.|\b)   )

demo: https://regex101.com/r/uz7yz6/4

corresponding java code:

string input = "2 ltr. btl., select   varieties when buy 6 $1.25 ea.-50¢  mix or match"; pattern pattern = pattern.compile(       "(?x)\\d+(?:\\.\\d+)?\\s+"     + "  (?:"     + "     (?:fl )?oz(?:\\.|\\b)|lbs?(?:\\.|\\b)|kg(?:\\.|\\b)|kg?\\b|g(?:\\.|\\b)"     + "   | pc?k(?:\\.|\\b)|ea(?:\\.|\\b)|ml(?:\\.|\\b)|[cq]t(?:\\.|\\b)"     + "   | liter\\b|ltr(?:\\.|\\b)"     + "  )" ); matcher matcher = pattern.matcher(input); while (matcher.find()) {     system.out.println(matcher.group()); }

https://ideone.com/pgdvvm


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