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Join the words

Return every word in the list joined with a comma and a space between them. An empty list gives an empty String, and there must be no separator on the end.

String join(java.util.ArrayList<String> words)

Solution.java

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Examples

Solution.join(new java.util.ArrayList<>(java.util.List.of("a", "b", "c"))) → a, b, c
Solution.join(new java.util.ArrayList<>(java.util.List.of("solo"))) → solo

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