🆙 Upgrade project dependencies and Java version; refactor code for improved compatibility and performance

Emulator/pom.xml

@@ -10,39 +10,27 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-
-        <additionalparam>-Xdoclint:none</additionalparam>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
     </properties>
 
-    <profiles>
-        <profile>
-            <id>java8-doclint-disabled</id>
-            <activation>
-                <jdk>[1.8,)</jdk>
-            </activation>
-            <properties>
-                <javadoc.opts>-Xdoclint:none</javadoc.opts>
-            </properties>
-        </profile>
-    </profiles>
-
     <build>
-
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.1</version>
+                <version>3.13.0</version>
                 <configuration>
-                    <source>16</source>
-                    <target>16</target>
+                    <source>19</source>
+                    <target>19</target>
+                    <release>21</release>
                 </configuration>
             </plugin>
 
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-assembly-plugin</artifactId>
-                <version>3.3.0</version>
+                <version>3.7.1</version>
                 <configuration>
                     <descriptorRefs>
                         <descriptorRef>jar-with-dependencies</descriptorRef>
@@ -67,9 +55,9 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
-                <version>3.2.0</version>
+                <version>3.10.1</version>
                 <configuration>
-                    <additionalOptions><additionalOption>-Xdoclint:none</additionalOption></additionalOptions>
+                    <doclint>none</doclint>
                     <show>public</show>
                 </configuration>
             </plugin>
@@ -81,10 +69,6 @@
             <id>central</id>
             <url>https://repo1.maven.org/maven2/</url>
         </repository>
-        <repository>
-            <id>mvnrepo</id>
-            <url>https://mvnrepository.com/</url>
-        </repository>
     </repositories>
 
     <dependencies>
@@ -92,21 +76,21 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-all</artifactId>
-            <version>4.1.49.Final</version>
+            <version>4.1.115.Final</version>
         </dependency>
 
         <!-- GSON -->
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.6</version>
+            <version>2.11.0</version>
         </dependency>
 
         <!-- MySQL Connector -->
         <dependency>
-            <groupId>mysql</groupId>
-            <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.22</version>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>9.1.0</version>
             <scope>runtime</scope>
         </dependency>
 
@@ -118,21 +102,23 @@
             <scope>compile</scope>
         </dependency>
 
-        <!-- https://mvnrepository.com/artifact/com.zaxxer/HikariCP -->
+        <!-- HikariCP -->
         <dependency>
             <groupId>com.zaxxer</groupId>
             <artifactId>HikariCP</artifactId>
-            <version>3.4.3</version>
+            <version>6.2.1</version>
             <scope>compile</scope>
         </dependency>
 
+        <!-- Apache Commons Lang -->
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.10</version>
+            <version>3.17.0</version>
             <scope>compile</scope>
         </dependency>
 
+        <!-- Apache Commons Math -->
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-math3</artifactId>
@@ -140,30 +126,41 @@
             <scope>compile</scope>
         </dependency>
 
+        <!-- JSoup -->
         <dependency>
             <groupId>org.jsoup</groupId>
             <artifactId>jsoup</artifactId>
-            <version>1.13.1</version>
+            <version>1.18.3</version>
             <scope>compile</scope>
         </dependency>
 
+        <!-- SLF4J API -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>2.0.16</version>
+        </dependency>
+
+        <!-- Logback -->
         <dependency>
             <groupId>ch.qos.logback</groupId>
             <artifactId>logback-classic</artifactId>
-            <version>1.2.3</version>
+            <version>1.5.15</version>
             <scope>compile</scope>
         </dependency>
 
+        <!-- Jansi -->
         <dependency>
             <groupId>org.fusesource.jansi</groupId>
             <artifactId>jansi</artifactId>
-            <version>1.18</version>
+            <version>2.4.1</version>
         </dependency>
 
+        <!-- Joda Time -->
         <dependency>
             <groupId>joda-time</groupId>
             <artifactId>joda-time</artifactId>
-            <version>2.10.6</version>
+            <version>2.13.0</version>
         </dependency>
     </dependencies>
 </project>

Emulator/src/main/java/com/eu/habbo/Emulator.java

@@ -97,7 +97,7 @@ public final class Emulator {
                 appender.start();
             }
 
-            Locale.setDefault(new Locale("en"));
+            Locale.setDefault(Locale.of("en"));
             setBuild();
             Emulator.stopped = false;
             ConsoleCommand.load();

Emulator/src/main/java/com/eu/habbo/habbohotel/commands/CommandHandler.java

@@ -53,7 +53,7 @@ public class CommandHandler {
     public static void addCommand(Class<? extends Command> command) {
         try {
             //command.getConstructor().setAccessible(true);
-            addCommand(command.newInstance());
+            addCommand(command.getDeclaredConstructor().newInstance());
             LOGGER.debug("Added command: {}", command.getName());
         } catch (Exception e) {
             LOGGER.error("Caught exception", e);

Emulator/src/main/java/com/eu/habbo/habbohotel/items/YoutubeManager.java

@@ -14,6 +14,7 @@ import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.net.URI;
 import java.net.URL;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -130,7 +131,7 @@ public class YoutubeManager {
         if(apiKey.isEmpty()) return null;
 
         YoutubePlaylist playlist;
-        URL playlistInfo = new URL("https://youtube.googleapis.com/youtube/v3/playlists?part=snippet&id=" + playlistId + "&maxResults=1&key=" + apiKey);
+        URL playlistInfo = URI.create("https://youtube.googleapis.com/youtube/v3/playlists?part=snippet&id=" + playlistId + "&maxResults=1&key=" + apiKey).toURL();
         HttpsURLConnection playlistCon = (HttpsURLConnection) playlistInfo.openConnection();
         if (playlistCon.getResponseCode() != 200) {
             InputStream errorInputStream = playlistCon.getErrorStream();
@@ -164,9 +165,9 @@ public class YoutubeManager {
             URL playlistItems;
 
             if (nextPageToken.isEmpty()) {
-                playlistItems = new URL("https://youtube.googleapis.com/youtube/v3/playlistItems?part=snippet%2Cstatus&playlistId=" + playlistId + "&maxResults=50&key=" + apiKey);
+                playlistItems = URI.create("https://youtube.googleapis.com/youtube/v3/playlistItems?part=snippet%2Cstatus&playlistId=" + playlistId + "&maxResults=50&key=" + apiKey).toURL();
             } else {
-                playlistItems = new URL("https://youtube.googleapis.com/youtube/v3/playlistItems?part=snippet%2Cstatus&playlistId=" + playlistId + "&pageToken=" + nextPageToken + "&maxResults=50&key=" + apiKey);
+                playlistItems = URI.create("https://youtube.googleapis.com/youtube/v3/playlistItems?part=snippet%2Cstatus&playlistId=" + playlistId + "&pageToken=" + nextPageToken + "&maxResults=50&key=" + apiKey).toURL();
             }
 
             HttpsURLConnection con = (HttpsURLConnection) playlistItems.openConnection();
@@ -190,7 +191,7 @@ public class YoutubeManager {
 
                 String commaSeparatedVideos = String.join(",", videoIds);
 
-                VideoItems = new URL("https://youtube.googleapis.com/youtube/v3/videos?part=contentDetails&id=" + commaSeparatedVideos + "&maxResults=50&key=" + apiKey);
+                VideoItems = URI.create("https://youtube.googleapis.com/youtube/v3/videos?part=contentDetails&id=" + commaSeparatedVideos + "&maxResults=50&key=" + apiKey).toURL();
                 HttpsURLConnection con1 = (HttpsURLConnection) VideoItems.openConnection();
                 InputStream is1 = con1.getInputStream();
                 InputStreamReader isr1 = new InputStreamReader(is1);

Emulator/src/main/java/com/eu/habbo/habbohotel/wired/highscores/WiredHighscoreManager.java

@@ -29,7 +29,7 @@ public class WiredHighscoreManager {
     private final static String locale = (System.getProperty("user.language") != null ? System.getProperty("user.language") : "en");
     private final static String country = (System.getProperty("user.country") != null ? System.getProperty("user.country") : "US");
 
-    private final static DayOfWeek firstDayOfWeek = WeekFields.of(new Locale(locale, country)).getFirstDayOfWeek();
+    private final static DayOfWeek firstDayOfWeek = WeekFields.of(Locale.of(locale, country)).getFirstDayOfWeek();
     private final static DayOfWeek lastDayOfWeek = DayOfWeek.of(((firstDayOfWeek.getValue() + 5) % DayOfWeek.values().length) + 1);
     private final static ZoneId zoneId = ZoneId.systemDefault();
 

Emulator/src/main/java/com/eu/habbo/messages/PacketManager.java

@@ -179,7 +179,7 @@ public class PacketManager {
                     return;
                 }
 
-                final MessageHandler handler = handlerClass.newInstance();
+                final MessageHandler handler = handlerClass.getDeclaredConstructor().newInstance();
 
                 if (handler.getRatelimit() > 0) {
                     if (client.messageTimestamps.containsKey(handlerClass) && System.currentTimeMillis() - client.messageTimestamps.get(handlerClass) < handler.getRatelimit()) {

Emulator/src/main/resources/logback.xml

@@ -1,9 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
     <appender name="Console" class="ch.qos.logback.core.ConsoleAppender">
-        <withJansi>false</withJansi>
         <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%-14thread] %highlight(%-5level) %cyan(%-36logger{36}) - %msg%n</pattern>
+            <pattern>%d{HH:mm:ss.SSS} [%-14thread] %-5level %-36logger{36} - %msg%n</pattern>
         </encoder>
     </appender>
 
@@ -54,15 +53,11 @@
         </encoder>
     </appender>
 
-    <logger name="io.netty">
-        <level value="info"/>
-    </logger>
+    <logger name="io.netty" level="INFO"/>
 
-    <logger name="com.zaxxer.hikari">
-        <level value="error"/>
-    </logger>
+    <logger name="com.zaxxer.hikari" level="ERROR"/>
 
-    <root level="info">
+    <root level="INFO">
         <appender-ref ref="Console" />
         <appender-ref ref="FileDebug" />
         <appender-ref ref="FileErrors" />