bestcourses is supported by learners. When you buy through links on our website, we may earn an affiliate commission. Learn more

Java - Top 10 most viewed questions on Stack Overflow

This questions are covering essential parts of Java and because of that we all should know and understand them!

4.7 / 5.0
7004 students2 hours 25 minutes

Created by Armin Kerscher, offered on Udemy

bestcourses scoreβ„’

Student feedback


To make sure that we score courses properly, we pay a lot of attention to the reviews students leave on courses and how many students are taking a course in the first place. This course has a total of 7004 students which left 18 reviews at an average rating of 4.7, which is average.

Course length


We analyze course length to see if courses cover all important aspects of a topic, taking into account how long the course is compared to the category average. This course has a length of 2 hours 25 minutes, which is pretty short. This might not be a bad thing, but we've found that longer courses are often more detailed & comprehensive. The average course length for this entire category is 4 hours 58 minutes.

Overall score


This course currently has a bestcourses score of 6.8/10, which makes it an average course. Overall, there are probably better courses available for this topic on our platform.


In this course we are going to examine the top 10 most viewed Java question on Stack Overflow since creation of this platform (*state October 2019)

Stack Overflow itself has according to wikipedia over 10 million registered users and has exceeded over 16 million questions.

This is why I believe that every software developer should get in touch with them. They are covering the essential parts of the programming language and because of that we all should know about them.

I will explain everything what you will need to first understand the questions and then be able to answer them on your own.

What topics can you expect within this course?

* I will explain to you what references on objects are and how Java saves them internally. We take a closer look to the so called null reference that often results in NullPointerExceptions.

* We get to know several data structures, such as Maps, HashMaps, Sets and many more.

* How do I compare two strings, or more general two objects with each other? And what has Java's String pool to do with it?

* We become acquainted with syntactical abbreviations like the for-each-loop or try-with-resource statement.

* We answer the eternal question if Java is a call by reference or call by value language or maybe both?

* How can I create random numbers in general or within specific range? And what do I have to take account of, if I am developing multi-threaded applications?

* We learn what FileOutputStreams and PrintWriters are for and how to use them to create files and fill them with datas.

* And many more

What you will learn

  • πŸš€ References on objects, how Java handles them internally, NullPointerException
  • πŸš€ Comparison of objects via == and equals.
  • πŸš€ How to create and fill files with the help of streams
  • πŸš€ What does call by value and call by reference mean? And what does Java use?
  • πŸš€ Syntactical sugar like the for-each-loop
  • πŸš€ and many more


  • You should know the basics of Java.
Udemy logo
Available on


With almost 200,000 courses and close to 50 million students, Udemy is one of the most visited online learning platforms. Popular topics include software development, the digital economy, but also more traditional topics like cooking and music.

Frequently asked questions

  • Price: Free
  • Platform: Udemy
  • Language: English
  • 2 hours 25 minutes
Java - Top 10 most viewed questions on Stack Overflow thumbnail

bestcourses score: 6.8/10

There might be better courses available for this topic.