Exception in thread "main" java.lang.UnsupportedClassVersionError: com/l2jserver/gameserver/GameServer : Unsupported major.minor version 51.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClassCond(Unknown Source) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$000(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) Could not find the main class: com.l2jserver.gameserver.GameServer. Program will exit.
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Hello,
I’m working on decrypting the Init packet that the server sends to the client during login. This packet is treated specially and contains the Blowfish keys used to encrypt and decrypt subsequent packets. Although it isn’t encrypted irreversibly and should be reversible, I haven’t succeeded yet.
My goal is to extract the Blowfish key to decrypt certain client packets without disrupting the normal session flow. I can inject a DLL to sniff the packets, and with that I plan to develop a module that extends the client’s functionality. For example, after logging in, this module would capture all the data the client receives (character data, etc.). Additionally, it could listen for real-time server events, enabling integrations with Discord SDKs or other systems, thereby expanding Lineage 2’s capabilities.
Init packet(0x00) LoginServer.
Currently in the java Cores I checked there is no decode function for this package, only encript.
Information
Selling a premium Lineage 2 High Five (L2J) project with active development, available by subscription.
Includes Git support and access to compiled or full source code.
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General Project Specifications:
JDK Version: 23 -> 24
Chronicle: HighFive
Structure: Core & Datapack merged into a single project
Database: MariaDB
Database Driver: HicariCP
GIT Website: gitlab.com
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18. Daily Reward
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24. Secondary Auth Using Google Authenticator (Check Youtube Video)
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Question
MouzasSierra117
some help with this error pleaze? i dont remember what i have done in this pack but it was working perfect till i upgrade to win 10 pro x64!
System:
i7 4790k
msi Z97-G45 gaming mobo
16 GB corsair vegeance 1.6Ghz
sapphire R9 280 dual X 3GB
Java Jre/JDK 6 update 45
mySql community server 5.1
Navicat for mysql 8
pack info:
L2J revision 7779
gameserver error:
--------------------------------------------------------------------------------------------------------------------------------------------------
Starting L2J Game Server.
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/l2jserver/gameserver/GameServer : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: com.l2jserver.gameserver.GameServer. Program will exit.
Game Server Terminated Abnormally!
Game Server Terminated.
Press any key to continue . . .
-----------------------------------------------------------------------------------------------------------
I think i have wrong version of java but i would like your suggestions
Edited by MouzasSierra1172 answers to this question
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