2 Common Problems

sk89q edited this page 2015-05-02 16:36:20 -07:00

Table of Contents

• java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0

java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0

This is because a mod (or library) was made with a newer version of Java than the one that the user is using.

• 50 refers to Java 6 (so the user is using Java 5 or older)
• 51 refers to Java 7 (so the user is using Java 6 or older)
• 52 refers to Java 8 (so the user is using Java 7 or older)

Launcher Wiki

Tutorial

1. Initial Steps
   • Customizing the Launcher
2. Creating Modpacks
   • Using Loaders
   • Optional Features
   • Command Line Tools
3. Configuring Self-Update

Launcher Features:

• Fancy Launcher
• Portable Mode
• Hidden Modpacks
• Deploying Server Modpacks
• Launcher Arguments
• Custom JAR (.jar mods)
• Custom Version Manifest

Customization:

• Localization
• News Page Guide
• Custom Microsoft OAuth application
• Using an IDE (Eclipse, IntelliJ)

Additional Reading:

• FAQ
• Common Problems
• Website Hosting
• Getting Help

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Need help? See Getting Help.