Introduction Multithreading is a powerful concept in Java that allows concurrent execution of multiple threads. It enables developers to write more efficient and responsive programs by dividing tasks into smaller threads that can run concurrently. In this blog post, we will explore the fundamentals of multithreading in Java, accompanied by example code and a compilation of the top 20 interview questions and answers. Understanding Multithreading in Java 1. What is Multithreading? Multithreading is the concurrent execution of two or more threads. A thread is the smallest unit of execution within a process, and multithreading allows these threads to run independently, sharing the same resources. 2. Creating Threads in Java In Java, there are two ways to create threads: a. Extending the Thread class java class MyThread extends Thread { public void run () { // Code to be executed in the new thread } } // Creating and starting a thread MyThread myThread = new My...
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...