Use HexFormat for converting from bytes to hex string and the other way round

src/main/java/client/command/commands/gm3/PeCommand.java

@@ -64,7 +64,7 @@ public class PeCommand extends Command {
 
         }
 
-        byte[] packetContent = HexTool.getByteArrayFromHexString(packet);
+        byte[] packetContent = HexTool.toBytes(packet);
         InPacket inPacket = new ByteBufInPacket(Unpooled.wrappedBuffer(packetContent));
         short packetId = inPacket.readShort();
         final PacketHandler packetHandler = PacketProcessor.getProcessor(0, c.getChannel()).getHandler(packetId);