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Java / Java 21 Coding Standards Interview Questions

How do you optimize import statements and static imports per a Java style guide?

Optimizing imports starts with removing anything unused - most IDEs offer an "optimize imports" action that deletes dead imports and collapses duplicate ones automatically as part of a pre-commit or save action.

import static java.util.stream.Collectors.toList;
import static org.junit.jupiter.api.Assertions.assertEquals;

Static imports are reserved for members used frequently and unambiguously in the file, such as test assertions (assertEquals) or well-known utility methods (Collectors.toList); statically importing a method whose name alone does not make its owning class obvious, like a generic process(), hides where that behavior actually comes from.

The overall standard is to keep the import block small enough to scan in a glance - grouped, alphabetized, with no wildcards - since a bloated or disorganized import section is itself a signal that the class may be depending on too many unrelated things.

Static imports work best for members that are:
A bloated, disorganized import block can be a signal that:

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