Vowel Count

ardallie · ardallie · commit 058f92b2b6d0 · 2021-08-16T22:36:17.000+01:00
diff --git a/src/easy/VowelCount.java b/src/easy/VowelCount.java
@@ -0,0 +1,44 @@
+package easy;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Have the function VowelCount(str) take the str string
+ * parameter being passed and return the number of vowels
+ * the string contains (i.e. "All cows eat grass and moo" would return 8).
+ * Do not count y as a vowel for this challenge.
+ */
+public class VowelCount {
+
+  /**
+   * Vowel Count function.
+   *
+   * @param str input string
+   * @return the number of vowels in a string
+   */
+  private static int vowelCount(String str) {
+    Pattern pattern = Pattern.compile("[aeiou]");
+    Matcher matcher = pattern.matcher(str);
+    int i = 0;
+    int count = 0;
+    while (matcher.find(i)) {
+      count++;
+      i = matcher.start() + 1;
+    }
+    return count;
+  }
+
+  /**
+   * Entry point.
+   *
+   * @param args command line arguments
+   */
+  public static void main(String[] args) {
+    var result1 = vowelCount("I cannot sleep unless I am surrounded by books.");
+    System.out.println(result1);
+    var result2 = vowelCount("Life itself is a quotation.");
+    System.out.println(result2);
+  }
+
+}
