✅ MASTER PREREQUISITES FOR ANY SOFTWARE DEVELOPER BEFORE LEARNING A NEW DOMAIN (The Ultimate Developer Checklist – Must Read Before Starting Any Project or Domain) ⭐ INTRODUCTION When a developer enters a new domain (banking, payments, SaaS, ERP, ecommerce) or a new project/company , 90% of their success depends on understanding the right prerequisites . This guide gives the exact checklist top developers follow to gain mastery fast and become the “go-to” person in any team. 🚀 1. TECHNICAL PREREQUISITES Before learning any domain, a developer must be clear in these areas: 1.1 Core Programming (Java Example) Must be comfortable with: OOP Collections Streams Exceptions Multithreading basics Design patterns API development (REST) 1.2 Backend Framework Mastery Ex: Spring Boot You must know: Controllers Services Repositories AOP JWT/security Schedulers Configurations (YAML/properties) 1.3 Databases You must understand:...
To find the second-highest salary from a list of employees using Java 8 streams, you can follow these steps: Create a list of employees with their salaries. Use Java 8 streams to sort the employees by salary in descending order. Skip the first element (which is the employee with the highest salary). Get the first element of the remaining stream (which is the employee with the second-highest salary). Example code: java import java.util.ArrayList; import java.util.List; class Employee { private String name; private double salary; public Employee (String name, double salary) { this .name = name; this .salary = salary; } public double getSalary () { return salary; } } public class SecondHighestSalary { public static void main (String[] args) { List<Employee> employees = new ArrayList <>(); employees.add( new Employee ( "John" , 60000.0 )); employees.add( new Employe...