Collection Enhancements in Java 8 Java 8 brought a significant set of enhancements to the Collections framework, making it more powerful, efficient, and expressive. In this blog post, we will explore the top collection enhancements introduced in Java 8, understand their use cases, and provide example code to demonstrate their practical applications. 1. Streams Use : Streams allow you to process collections of data in a functional style, making code more concise and expressive. They enable filtering, mapping, and reducing operations on collections. Example Code : java List<Integer> numbers = Arrays.asList( 1 , 2 , 3 , 4 , 5 ); int sum = numbers.stream() .filter(n -> n % 2 == 0 ) .mapToInt(Integer::intValue) .sum(); System.out.println( "Sum of even numbers: " + sum); 2. Lambda Expressions Use : Lambda expressions simplify the creation of anonymous classes, which is common in collection processing, making code more readable. Example Code : java List...
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...