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Wildcard (star) imports like import java.util.*; are prohibited in the codebase as they reduce code readability and can cause naming conflicts. Always import specific classes individually.

Configure your IDE to disallow wildcard imports:

• In IntelliJ IDEA: Navigate to Editor -> Code Style -> Java -> Imports and set ‘Class count to use import with *’ to 999.
• The same setting should be applied for ‘Names count to use static import with *’.

Instead of:

import java.util.*;

Use:

import java.util.List;
import java.util.Map;
import java.util.Set;

This makes dependencies explicit and avoids potential name conflicts when classes with the same name exist in different packages.