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@PreConstruct and @PostConstruct annotation Spring Boot Example

Jan 5, 2025 · 1 min read · https://youtu.be/kyWZckKWoF4?si=CmpL3g-CtM3c4XtQ @PostConstruct: This method is called after the Spring bean (in this case, ExampleBean) has been created and all dependencies have been injected. It’s an ideal place to put initialization logic. @P...

How does reduce() differ from collect() in Java streams?

Dec 8, 2024 · 3 min read · The reduce() and collect() methods in Java Streams serve different purposes and operate at different levels of abstraction. Here’s a detailed comparison: 1. reduce() The reduce() method is used for reducing a stream of elements to a single result usi...

Why is 1 == 1 is true but 1000 == 1000 is false When dealing with Wrapper Classes in Java?

Sep 15, 2024 · 3 min read · For Explanation watch video https://youtu.be/5yk-1MoK3QY In Java, the behavior where 1 == 1 is true but 1000 == 1000 is false when dealing with wrapper classes can be surprising. This is due to how Java handles object comparison and the concept of ...

How to generate QR Code Using Spring Boot

Jan 13, 2024 · 2 min read · For Explanation watch video https://youtu.be/wWTNrcsbebc?si=MJ5jqZGh8RkO3KZj to generate QR we will use ZXing ZXing (“Zebra Crossing”) barcode scanning library for Java, Android QR code is used to store large amounts of data in a limited space Dire...

how to dockerize a spring boot 3 application

Jun 19, 2023 · 1 min read · https://youtu.be/TTGpqKU7UYY create project add web dependency create controller pkg and class HelloController HelloController package com.example.demo.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springfram...