Coding Interview Question Based Solving Real-Time Example Using Java 8 Features

In this article, we explore solving real-time queries using Java 8 features, with a focus on a School and Teacher example. We will utilize streams and collectors to address various questions about teacher data, demonstrating practical Java 8 solutions for common coding interview scenarios.

Java 8 Features for Real-Time Data Queries

import java.util.*;
import java.util.stream.Collectors;

class Teacher {
    int id;
    String name;
    int age;
    String gender;
    String subject;
    double salary;
    int yearOfJoining;

    public Teacher(int id, String name, int age, String gender, String subject, double salary, int yearOfJoining) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.subject = subject;
        this.salary = salary;
        this.yearOfJoining = yearOfJoining;
    }

    // Getters and toString method for easy printing
    public String getName() { return name; }
    public String getGender() { return gender; }
    public String getSubject() { return subject; }
    public double getSalary() { return salary; }
    public int getYearOfJoining() { return yearOfJoining; }
    public int getAge() { return age; }
    @Override
    public String toString() {
        return String.format("Teacher{id=%d, name='%s', age=%d, gender='%s', subject='%s', salary=%.2f…