Quick Answer

Resolve non-static reference in static context.

Understanding the Issue

Occurs when trying to access instance members from static methods. Static methods belong to the class, not instances.

The Problem

This code demonstrates the issue:

Java Error 
public class Util {
    private String name;
    
    public static void print() {
        System.out.println(name); // Error
    }
}

The Solution

Here's the corrected code:

Java Fixed 
// Solution 1: Make member static
private static String name;

// Solution 2: Use instance method
public void print() {
    System.out.println(this.name);
}

// Solution 3: Pass instance as parameter
public static void print(Util util) {
    System.out.println(util.name);
}

Key Takeaways

Understand static vs instance contexts in Java.