Spring Boot @Async — Complete Deep Explanation 1. First understand what @Async actually does Normally, Java executes method calls synchronously. public void process() { method1(); method2(); method3(); } Execution…
Yes 😄. Let's make @Transactional so simple that even a dog could understand it. Think of a transaction like a dog carrying two biscuits. 🐕🍪🍪 🐕 First understand: What…
package Javapractice; import java.util.stream.Stream; public class practice { public static void main(String[] args) { // TODO Auto-generated method stub //write a java8 program from a employee class with name and…
public class practice { public static void main(String[] args) { // TODO Auto-generated method stub //write a program to find the duplicate elements in an array and print the duplicate…
public class practice { public static void main(String[] args) { // TODO Auto-generated method stub String s="nima"; //reverse string String rev=""; for(int i=s.length()-1;i>=0;i--) { rev=rev+s.charAt(i); } } }
How does Spring Boot decide the order of auto-configurations? Spring Boot’s auto-configuration order looks magical from the outside, but internally it follows a very deterministic algorithm based on class loading,…
Why does @Value sometimes fail to inject properties? @Value failing to inject properties is one of the most confusing Spring problems because it often fails silently or only in specific…
What happens if @PostConstruct throws an exception? When a @PostConstruct method throws an exception in Spring, it is treated as a fatal bean initialization failure — and depending on where…
How do you detect bean initialization issues in large applications? Detecting bean initialization issues in large Spring applications is one of the most important real-world debugging skills — because most…
Why does a Spring Boot app consume more memory over time? 1. JVM Memory Model (Important Foundation) Spring Boot runs on the JVM, which manages memory automatically. Main JVM Memory…
