Quick Answer

Fix class loading failures at runtime.

Understanding the Issue

Occurs when JVM can't find a class definition that was available at compile time. Typically caused by missing dependencies or incorrect classpath.

The Problem

This code demonstrates the issue:

Java Error 
// Class existed during compilation
MyClass obj = new MyClass(); // Fails at runtime

The Solution

Here's the corrected code:

Java Fixed 
// Solution 1: Check classpath
// java -cp "lib/*" MainClass

// Solution 2: Verify dependencies
// Maven: mvn dependency:tree
// Gradle: gradle dependencies

// Solution 3: Check for packaging issues
// Ensure proper JAR/WAR packaging

Key Takeaways

Always verify runtime classpath matches compile dependencies.