Unused Import

ID

java.unused_import

Severity

low

Remediation Complexity

auto_fix

Remediation Risk

low

Remediation Effort

low

Resource

Code Smell

Language

Java

Tags

code-style, unused-code

Description

Reports import statements whose imported class is never referenced in the file body.

Rationale

Unused imports clutter the namespace, slow down IDE indexing, and can confuse readers about the actual dependencies of a class. They typically accumulate over time as code is refactored and references are removed without cleaning up the corresponding imports.

// Bad -- List and Map are never used in this file
import java.util.List;
import java.util.Map;
import java.util.ArrayList;

public class Example {
    private ArrayList<String> items = new ArrayList<>();
}

// Good -- only import what you use
import java.util.ArrayList;

public class Example {
    private ArrayList<String> items = new ArrayList<>();
}

Remediation

Remove the unused import statements. Most IDEs provide an "Organize Imports" action that handles this automatically.

References