# HowToDoInJava: Java, Spring and Hibernate Tutorials

> Simple and easy\-to\-follow free tutorials on Core Java, Spring, Spring Boot, Maven, JPA, Hibernate, JUnit, Python and other popular libraries\.

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## Pages
- [Design Patterns](https://howtodoinjava.com/gang-of-four-java-design-patterns/)
- [Privacy Policy](https://howtodoinjava.com/privacy-policy/)
- [Java Tutorials](https://howtodoinjava.com/)
- [Java 8 Tutorial](https://howtodoinjava.com/java-8-tutorial/)
- [JUnit 5 Tutorial \(with Examples\)](https://howtodoinjava.com/junit-5-tutorial/)

## Posts
- [Stellar Repair for MySQL Review: Fix MySQL "Table Is Marked as Crashed and Should Be Repaired" \(\#1194\) Error](https://howtodoinjava.com/sql/mysql-table-marked-crashed-and-should-be-repaired/): Learn to fix MySQL error \#1194 \(“Table is marked as crashed”\) with Stellar Repair for MySQL\. Read this detailed guide for step\-by\-step repair process\. Discover how to quickly restore corrupted MySQL tables with minimal data loss\.
- [@Autowired Annotation in Spring Boot](https://howtodoinjava.com/spring-boot/autowired-annotation-guide/): Spring Boot @Autowired connects the classes together without tight coupling, making application modular, testable, and easy to maintain\.
- [JUnit @AutoClose Annotation with Examples](https://howtodoinjava.com/junit/junit-autoclose-examples/): JUnit @AutoClose automatically close resources that implement AutoCloseable after each test, without requiring explicit cleanup code\. If any exception occurs during closing the resource, the exception is suppressed\.
- [Setting Up JUnit with Spring Boot Test](https://howtodoinjava.com/junit/junit-version-with-spring-boot/): Whether you are building REST APIs, service\-layer logic, or data\-access layers, Spring Boot offers first\-class support for JUnit and provides convenient annotations and utilities for writing clean, maintainable tests\.
- [JUnit 6 Nullability: @Nullable, @NotNull \& @NullMarked](https://howtodoinjava.com/junit/junit-6-nullability/): With the release of JUnit 6\.0\.0, the maintainers adopted JSpecify nullability annotations across all JUnit modules\. It means that method parameters, return types, and other API elements in JUnit are now annotated to explicitly declare whether they accept or return null\.

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