Spring Data DynamicInsert Annotation Example

1. Introduction Spring Data JPA supports common JPA providers, e.g. Hibernate, EclipseLink, etc. Hibernate pre-generates and caches static SQL insert…

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Find Nested Key via Jackson Example

1. Introduction JavaScript Object Notation (JSON) is a text-based format for storing and exchanging data. It’s commonly used to transfer data…

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String and StringBuilder Converting Example

1. Introduction Java String class is from the java.lang package and represents a sequence of characters and it’s immutable. The…

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Select Value From Dropdown Using Selenium Webdriver Example

1. Introduction Selenium is an open-source testing framework for web applications. It supports common web browsers. For example, Selenium supports Google…

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Check Array Is Null or Empty Example

1. Introduction An array is a data structure that holds a fixed number of elements with the same data type.…

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Spring Validator Validation Example

1. Introduction Spring Validation Framework includes the Validator interface that handles data validation. It is used to implement custom validation…

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JPA Inheritance vs Composition Spring Boot Example

1. Introduction Inheritance is an “IS-A” type of relationship in object-oriented programming (OOP). Inheritance is tightly coupled since child classes…

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Convert Optional to ArrayList

1. Introduction Java 8 introduced the java.util.Optional class to represent a value that may or may not be present to…

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Convert Short to Byte Array

1. Introduction Converting a short value to a byte array is a common task when dealing with binary data. In…

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