Abstract Factory
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Patterns are tools, not goals. These are common misuses that reduce clarity and maintainability.
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Dependency injection in Java: constructor injection by hand, why DI matters, the Service Locator anti-pattern, and a brief intro to Spring, Guice, and OSGi.
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Abstraction
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This section collects GoF patterns with practical examples and guidance. Use it to pick a suitable pattern, not to force one.
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