Added Same Release Month Checker + Tests + Javadoc

projjpn/src/main/java/de/hs_fulda/ciip/projjpn/Games.java

@@ -1333,6 +1333,53 @@ public class Games {
 		return result.substring(0, result.length() - 2);
 	}
 	
+	/**
+	 * Checks if the release years are all the same across Europe, Japan, North
+	 * America and Australia.
+	 * 
+	 * @return Prints the games which have the same release year.
+	 */
+	public String checkAllSameReleaseMonth() {
+		String result = "";
+		String query = "SELECT Game_Name, Game_Release_EU, Game_Release_JP, Game_Release_NA, Game_Release_AU FROM Games";
+
+		try {
+			Connection connection = DriverManager.getConnection(databaseURL);
+
+			Statement statement = connection.createStatement();
+			ResultSet resultSet = statement.executeQuery(query);
+
+			while (resultSet.next()) {
+				String gameName = resultSet.getString("Game_Name");
+				String gameReleaseEu = resultSet.getString("Game_Release_EU");
+				String gameReleaseJp = resultSet.getString("Game_Release_JP");
+				String gameReleaseNa = resultSet.getString("Game_Release_NA");
+				String gameReleaseAu = resultSet.getString("Game_Release_AU");
+
+				if (gameReleaseAu == null) {
+
+				} else {
+					if (gameReleaseEu.substring(5, 7).equals(gameReleaseJp.substring(5, 7))
+							&& gameReleaseJp.substring(5, 7).equals(gameReleaseNa.substring(5, 7))
+							&& gameReleaseEu.substring(5, 7).equals(gameReleaseNa.substring(5, 7))
+							&& gameReleaseAu.substring(5, 7).equals(gameReleaseEu.substring(5, 7))
+							&& gameReleaseAu.substring(5, 7).equals(gameReleaseJp.substring(5, 7))
+							&& gameReleaseAu.substring(5, 7).equals(gameReleaseNa.substring(5, 7))) {
+						result += gameName + ", ";
+					}
+				}
+
+			}
+			statement.close();
+			connection.close();
+
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+
+		return result.substring(0, result.length() - 2);
+	}
+
 	/**
 	 * Checks if the game is compatible with one player or more.
 	 * 

projjpn/src/test/java/de/hs_fulda/ciip/projjpn/GamesTest.java

@@ -192,6 +192,13 @@ public class GamesTest extends TestCase {
 		assertEquals(expected, actual);
 	}
 	
+	public void test_checkAllSameReleaseMonth() {
+		Games testObject = new Games();
+		String expected = "Astral Chain, Fire Emblem: Three Houses, Triangle Strategy, Super Smash Bros. Ultimate, AI: The Somnium Files";
+		String actual = testObject.checkAllSameReleaseMonth();
+		assertEquals(expected, actual);
+	}
+
 	public void test_checkOnePlayer() {
 		Games testObject = new Games();
 		String expected = "Persona 5 Royal, Ratchet & Clank, Astral Chain, Fire Emblem: Three Houses, Triangle Strategy, Rhythm Paradise, Super Smash Bros. Ultimate, Yakuza: Dead Souls, Jet Set Radio Future, Breakdown, AI: The Somnium Files, Persona 3 Portable, Tomodachi Life, Beautiful Katamari, Atelier Totori Plus, Crash Bandicoot N. Sane Trilogy";