Basic User Input Validation in Java

In this video we build upon the handling runtime errors video content by using a try and catch block to handle basic user input validation. We show how input from the keybaord through the Java Scanner class can fail if the user enters an incorrect data type and we develop a solution that uses String input, a loop and a try and catch block to solve the problem.

Look out the for the typo in the code comments and have a listen for the interuption from Google Assistant. Forgot to turn off my phone during recording......

[affable.pebble]

Hey Stephen, so glad to have found your channel!! Your way of going through the process taking us through all the steps is not just teaching coding but showing proper programming mentality. I appreciate you!

[aborda]

This video is so good and Stephen thank you.

[geraldinejns]

Outstanding. Now I understand input validation. You should've taught my C++ class.

[CRA]

Thank you! you really helped me get through a slump.

[gabrielmiyamoto]

very detailed step by step! thank you for making this!

[desteniwhite]

I love how you explain things! It's very newbie friendly! I'm in an online program that doesn't really help me much. So, this video helps to fill in the gaps for sure!

[parisanikzad]

Very good job!
Input validation is very important in Java Application Security and you explained it very well.
I wish you had more video in Java Security

[Quadrt]

Nice, exactly what I needed! Thanks for the detailed explanation!

[homemoviesandphotos]

Thanks, you explain coding at a good pace and fully explain what is going.

[yhvwjym]

Again very good, clear and concise explanations and easy to follow

[themanforallseasons]

Fantastic video. This really helped me out!

[jasonoh]

Very good at explaining and making it easy to understand the material. I really like your video and I really appreciate it.

[linuxlavender]

My problem wasn't exactly what you were teaching ( I was trying to take in a String, use switch to check first ch upper/lower 'n' to quit, upper/lower 'y' to validate entry. ). However, you give such clearly spoken detailed lessons that I was able to drop the try/catch, work a while Boolean validation around my User Input & Switch, which finally gave me the result I was struggling to achieve. I was loath to ask for help & really wanted to get this on my own (even though I am obvious very green).Yet, I learned more than I was looking for as well as got what I needed done. This is just a long-winded thank you very much!

[kalicorrell]

This video was highly informative and very helpful, thank you! :)

[stephendavol]

Excellent video. Thanks for breaking down each step with a detailed explanation. What if Input Mismatch Exception was used in the catch parameters? That was the exception displayed when you originally entered a non integer input. Thanks!

[thiagodarocha]

How's possible you have only 1.11k subscribers!! Your content is amazing, thanks for saving me

[sabrinamimouni]

Thank you so very much!!! My code is perfectly working now for "float data type validation"; and I added a non-negative condition as well. Wanna cry happy tears !!!

[colea_]

Helpful video. Thanks. Make the video if possible, because they are very useful. And Thanks again:)..

[markpaul]

Wonderful video. What program is this on?