Tech Tutorials

Tutorials and posts about Java, Spring, Hadoop and many more. Java code examples and interview questions. Spring code examples.

Monday, September 1, 2025

Spring Boot Unit Test For REST API

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In this article we'll see how to unit test Spring Boot REST API. As the name "unit test" itself suggests classes should be t...
Tuesday, August 26, 2025

Spring Boot + Data JPA + MySQL REST API CRUD Example

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In this post Spring Data tutorial we got to know about Spring Data and how to use it. In this tutorial we'll create a Spring Boot RE...
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Wednesday, July 30, 2025

Python Lambda Functions With Examples

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Python lambda function is a function without any name (an anonymous function) which is created using lambda keyword. Syntax of lambda func...
Thursday, June 26, 2025

Virtual Threads in Java

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In this tutorial we'll see what are virtual threads in Java which are added in Java 21. Platform threads Traditional threads which we...
Monday, June 23, 2025

Spring Boot + Spring Security JWT Authentication Example

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In this tutorial we’ll see how to create a Spring Boot application that uses Spring Security and JWT token based authentication to bring au...
Thursday, June 19, 2025

useFetcher() Hook in React Router With Example

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In this post we'll see how to use useFetcher() hook in React Router. Generally, when we have a loader or action function any call to ...

CRUD Example With React Router Loader and Action

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In the post- Actions in React Router For Data Mutation we saw how to handle data mutation and add a new record using action function. In...
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