LowFile-scopeJava Plug & play

Use static constants for inline collections

Extract repeated inline collections to unmodifiable static constants.

Why this matters

Improves readability and prevents accidental mutation.

Side-by-side examples engineers can pattern-match during review.

Avoid

if (Set.of("A","B","C").contains(t)) { ... }

Prefer

private static final Set<String> ALLOWED = Set.of("A","B","C");
if (ALLOWED.contains(t)) { ... }

Bad

List.of("x","y") scattered

Good

static final List<String> KEYS = List.of("x","y")

From the same buckets as this rule.

Critical
Avoid Duplicating String Literals
Store repeated string literals in constants or variables to improve maintainability and reduce redundancy.
duplication-complexitymaintainability
Critical
Avoid Redundant `None` Comparisons
Identify cases where `x is None` or `x is not None` is used redundantly when `x` is always or never `None`. This may indicate a deeper logic issue.
duplication-complexityreadability-refactor+1
High
Avoid Functions That Always Return the Same Value
Identify functions that return the same value regardless of input. This may indicate poor design or a logic error.
duplication-complexityreadability-refactor+1