Software⏱️ 1 min read📅 2026-06-03
How to Fix: How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
Notepad++ not compatible with JRE version
Quick Answer: Update JRE to a compatible version or use an alternative IDE.
📋 Table of Contents
The Java UnsupportedClassVersionError occurs when the Java Virtual Machine (JVM) encounters a class file that was compiled with an incompatible version of the Java compiler. This error is often caused by using an older version of Java or JRE that does not match the version used to compile the application.
🛑 Root Causes of the Error
- Using an older version of Java or JRE that does not match the version used to compile the application.
🚀 How to Resolve This Issue
Method 1: Updating the Java Runtime Environment (JRE)
- Step 1: Open the Control Panel and navigate to System and Security, then click on
❓ Frequently Asked Questions
Using an older version of Java or JRE that does not match the version used to compile the application.
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