Java Simplest way to get last word in a string

Question

What is the simplest way to get the last word of a string in Java   You can assume no punctuation  just alphabetic characters and whitespace

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Get the last word in Kotlin   String substringAfterLast

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If other whitespace characters are possible  then you d want   testString split    s

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String testString    This is a sentence   String   parts   testString split       String lastWord   parts parts length - 1   System out println lastWord       sentence

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You can do that with StringUtils  from Apache Commons Lang   It avoids index-magic  so it s easier to understand  Unfortunately substringAfterLast returns empty string when there is no separator in the input string so we need the if statement for that case   public static String getLastWord String input        String wordSeparator            boolean inputIsOnlyOneWord    StringUtils contains input  wordSeparator       if  inputIsOnlyOneWord            return input            return StringUtils substringAfterLast input  wordSeparator

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Here is a way to do it using String s built-in regex capabilities   String lastWord   sentence replaceAll         w    W       1      The idea is to match the whole string from   to    capture the last sequence of  w  in a capturing group 1  and replace the whole sentence with it using  1   Demo

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String test     This is a sentence   String lastWord   test substring test lastIndexOf      1

[java] Java: Simplest way to get last word in a string

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