TheAlgorithms · Beck-berry · Apr 22, 2020
diff --git a/src/main/java/com/others/CountChar.java b/src/main/java/com/others/CountChar.java
@@ -0,0 +1,13 @@
+package com.others;
+
+public class CountChar {
+    /**
+     * Count non space character in string
+     *
+     * @param str String to count the characters
+     * @return number of character in the specified string
+     */
+    public static int countCharacters(String str) {
+        return str.replaceAll("\\s", "").length();
+    }
+}
diff --git a/src/main/java/com/others/CountWords.java b/src/main/java/com/others/CountWords.java
@@ -0,0 +1,37 @@
+package com.others;
+
+/**
+ * You enter a string into this program, and it will return how many words were
+ * in that particular string
+ *
+ * @author Marcus
+ */
+public class CountWords {
+    public static int wordCount(String s) {
+        if (s == null || s.isEmpty())
+            return 0;
+        return s.trim().split("[\\s]+").length;
+    }
+
+    /**
+     * counts the number of words in a sentence but ignores all potential
+     * non-alphanumeric characters that do not represent a word. runs in O(n) where
+     * n is the length of s
+     *
+     * @param s String: sentence with word(s)
+     * @return int: number of words
+     */
+    public static int secondaryWordCount(String s) {
+        if (s == null || s.isEmpty())
+            return 0;
+        StringBuilder sb = new StringBuilder();
+        for (char c : s.toCharArray()) {
+            if (Character.isLetter(c) || Character.isDigit(c))
+                sb.append(c);
+            if (Character.isSpaceChar(c))
+                sb.append(c);
+        }
+        s = sb.toString();
+        return s.trim().split("[\\s]+").length;
+    }
+}
diff --git a/src/test/java/com/others/CountCharTest.java b/src/test/java/com/others/CountCharTest.java
@@ -0,0 +1,17 @@
+package com.others;
+
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class CountCharTest {
+
+    @Test
+    void testCountChar(){
+        CountChar counter = new CountChar();
+        Assertions.assertEquals(0, counter.countCharacters(""), "Incorrect");
+        Assertions.assertEquals(11, counter.countCharacters("coincidence"), "Incorrect");
+        Assertions.assertEquals(8, counter.countCharacters("brownish"), "Incorrect");
+        Assertions.assertEquals(34, counter.countCharacters("thisisgoingtobeanillegallylongword"), "Incorrect");
+    }
+}
diff --git a/src/test/java/com/others/CountWordsTest.java b/src/test/java/com/others/CountWordsTest.java
@@ -0,0 +1,20 @@
+package com.others;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+public class CountWordsTest {
+
+    @Test
+    void testWordCounter(){
+        CountWords counter = new CountWords();
+        Assertions.assertEquals(0, counter.wordCount(""), "Incorrect");
+        Assertions.assertEquals(0, counter.secondaryWordCount(""), "Incorrect");
+
+        Assertions.assertEquals(1, counter.wordCount("coincidence"), "Incorrect");
+        Assertions.assertEquals(1, counter.secondaryWordCount("coincidence"), "Incorrect");
+
+        Assertions.assertEquals(7, counter.wordCount("This is a not so long sentence."), "Incorrect");
+        Assertions.assertEquals(7, counter.secondaryWordCount("This is a not so long sentence."), "Incorrect");
+    }
+}