Jee Java Tutorials
Spring Data JPA Specification Criteria Query generally used for search functionality. In this example we will use how to use collection or list of input parameters into CriteriaQuery to fetch data from database. Suppose you have a web page where you give…
Removes duplicates from String will remove duplicate characters (if any) from String using Java programming language. For example, let’s say we have a string “jeejava” and we want to remove duplicates from this string. So in this string the duplicate characters are…
Finding start and end index of an element in a sorted array using Kotlin programming language will be shown here. The array may contain duplicate elements and we will see how to find a start and end index for an element in…
In this tutorial we will see how to setup Liquibase in Spring for multiple datadources. In my previous tutorial we have seen how to setup multiple datadources in Spring Boot application. Here also we will create a Spring Boot application to define multiple…
SOLID design principle is one of the most popular sets of design principles in object-oriented software development. It’s a mnemonic acronym for the following five design principles: S – Single Responsiblity Principle O – Open Closed Principle L – Liskov Substitution Principle I…
This tutorial will show you how we can define multiple datasources in Spring Boot application. We have seen how to define multiple datasources in Spring application, but here we will define multiple datasources in Spring Boot application. There may be situations where…
This example will show you how to mock ObjectMapper.readValue() using Junit Mockito. When we write Junit test cases or classes, we generally do not test on real object that are injected into the class that has to be tested using Junit to…
The below example will show you how to mock an Autowired @Value field in Spring with Junit Mockito. Generally we read some configuration values from properties file into Spring bean or component class using @Value annotated attributes but when we want to…
The error, utility classes should not have a public or default constructor, you notice mainly in utility classes where you have declared your class method(s) as public static and your class does not have private constructor as well as your class has…
We will see here how to use checkstyle plugin in gradle based project. Checkstyle is a static code quality tool used to find Fan-out complexity of a class, complexity of method, utility class, bugs due to not following coding standards etc. so…