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In the
org.apache.commons.lang3.StringUtils
class, what is the difference between
splitByWholeSeparator(String, String)
,
splitPreserveAllTokens(String, String)
and
splitByWholeSeparatorPreserveAllTokens(String, String)
? I checked the
JavaDoc
and it is not clear at all why I would use one method over the others.
split
takes the separator string and treats every character in it as a separator char. Adjacent separator chars are seen as one, no empty array elements.
splitPreserveAllTokens
does the same but adjacent separator chars lead to empty array elements.
splitByWholeSeparator
uses the whole separator string to split the string. Adjacent separator strings are seen as one, no empty array elements.
splitByWholeSeparatorPreserveAllTokens
does the same but but adjacent separator strings lead to empty array elements.
An example:
String: "a,b,;,;e,f,,g,h"
Separator: ",;"
split: ["a","b","e","f,"g",h"]
splitPreserveAllTokens: ["a","b","","","","e","f","","g","h"]
splitByWholeSeparator: ["a,b","e,f,,g,h"]
splitByWholeSeparatorPreserveAllTokens: ["a,b","","e,f,,g,h"]
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