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Problem42.java
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29 lines (22 loc) · 908 Bytes
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package Problems;
import java.util.Arrays;
//Using Java 8 Streams, how do you extract all words from a sentence that contain exactly K vowels?
public class Problem42 {
public static long countVowels(String str){
return str.chars()
.mapToObj(ch->(char) ch)
.filter(ch->"aeiouAEIOU".indexOf(ch)!=-1)
.count();
}
public static void main(String[] args) {
String sentence = "Why only half? Because we compare characters from both ends, no need to go full length.";
int k=3;
// each word vowels count
// Arrays.stream(sentence.split(" "))
// .forEach(str->System.out.println(str+" -> "+countVowels(str)));
// In each word equals to k
Arrays.stream(sentence.split(" "))
.filter(word->countVowels(word)==k)
.forEach(System.out::println);
}
}