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List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl");

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List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl");

//get count of empty string

int count = strings.parallelStream().filter(string -> string.isEmpty()).count();

//It is very easy to switch between sequential and parallel streams.

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