Is there any advantage to using String.offsetByCodePoints instead of just using an integer index to keep track of where you are in a string?
Is there any advantage to using String.offsetByCodePoints instead of just using an integer index
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Is there any advantage to using String.offsetByCodePoints instead of just using an integer index to keep track of where you are in a string?
It might be useful if the string contains characters from the Unicode Supplementary Planes (unusual characters with a high code point / character code). Java strings use UTF-16 encoding internally, which means that some Unicode characters must be represented as a sequence of two
charvalues, also known as a surrogate pair. Thus, althoughs.charAt(i)will give you the i‘thcharofs, this might not actually be the i‘th character.s.offsetByCodePoints(0, i)will tell you the index where the i‘th character starts.If you are unfamiliar with some of the terms above, you should read Joel Spolsky’s excellent article on character sets.