ReverseWord & ReverseWordsTest (#2022)

* ReverseWord & ReverseWordsTest

* ReverseWord & ReverseWordsTest

* fixed ReverseWords

* Merge branch 'master' of https://github.com/TheAlgorithms/Java into Development

src/main/java/com/string/ReverseWords.java

@@ -0,0 +1,30 @@
+package com.strings;
+
+public class ReverseWords {
+  /**
+   * Converts all of the words in this {@code String} to reversed words
+   *
+   * @param s the string to convert
+   * @return the {@code String}, converted to a string with reveresed words.
+   */
+
+  public String returnReverseWords(String s) {
+    StringBuilder sb = new StringBuilder();
+    StringBuilder word = new StringBuilder();
+
+    for(int i = 0; i < s.length(); i++) {
+        char c = s.charAt(i);
+        if(c == ' ') {
+          
+            sb.append(word);
+            sb.append(" ");
+            word.setLength(0);
+            continue;
+        }
+        word.insert(0, c);
+    }
+    sb.append(word);
+
+    return sb.toString();
+  }
+}

src/test/java/com/string/ReverseWordsTest.java

@@ -0,0 +1,15 @@
+package com.string;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class ReveresWordsTest {
+
+    @Test
+    void testReverseWords() {
+        ReverseWords reverseWords = new ReverseWords();
+        Assertions.assertEquals(true, reverseWords.returnReverseWords("this is my car"), "siht si ym rac");
+        Assertions.assertEquals(true, reverseWords.returnReverseWords("ABC 123"), "CBA 321");
+
+    }
+}