Find Duplicate Characters In A String Java Program #32

This is the exact code to find duplicate characters in a String in Java! ✅I show how to use a for loop and charAt() to find duplicates.

To find duplicate characters in a string using java first create your input string, use a for loop to get each character in the string, store each character in a new string, and check if each current character has been added. If the current character has been passed, then we know the character is a duplicate!

This java program to find duplicate characters in a string can be tricky at first... But SURELY you'll get it :) If you followed along, congrats! You learned-by-doing!

I hope you enjoyed this tutorial on how to find duplicate characters in a string in java! I like to have a nice mix of tutorials and actual projects for you all :)

Has this program helped you?

Disclosure: The Springboard link provided is linked to my affiliate account & supports the channel.

~

Alex Lee

[raggamuffin]

I don't really get the music in the background. It's kind of disturbing especially when you are a beginner trying to understand what's actually going on there...

[teachernewteacher]

I like this video. It was very helpful. I am having similar issues with understanding many concepts. Please make me love Java and Automation ))). I really want to understand, learn and implement topics from Java in Automation. Thanks

[osejefavour]

This helped me do my assignment. I really appreciate this. I hope to be able to code like you one day. Thank you so much

[aprajitasingh]

@Alex, requesting you to avoid background music while explaining. It distracts 🥺

[unprecedentedignoramus]

The most diffiult programm so far, gonna go try to redo it to understand it

[subhrajitdebnath]

Thanks man! these videos helps the beginners

[adnanrafique]

Hi, Today I have to face the same question in my interview, thank you for making me understand, before my interview I have no idea about this algorithm.

[keeprunning]

just missed this question in coding interview; should have watched this; deberia de haber visto este video antes

[soccercastle]

Given an array of items (of any generic type), implement a method public static <T> List<T> removeDuplicates(T[ ] input) that removes any entry from input that occurs more than once and returns a List<T> object containing all the non-duplicates. Do you know how should I write this code? the main method line is like this " public static <T extends Comparable<T>> List<T> removeDuplicates(T[ ] input)"
this is actually my assignment :p

[arunamaurya]

Thanks.. I want this to be done without map and set.

[arpankumarkar]

You did a great job man so simply explained I like it.

[MOLOTONO]

The most useful video in this magnificent channel

[lux.]

thanks for today, i wait for your next video about JAVA :) i am your new Subscriber btw ;)

[crayonamin]

You saved my assignment 😍😍 my hero hahaha

[samr]

How to do this but instead of character u find the first word and so on

[a__atharvathosar]

I think you should add a continue statement in the inner if block after line 15 so that String characters won't have duplicate values. Nice video though, it was really helpful, THANK YOU!

[annap]

What about "H" and "h" technically they are duplicates as well?

[bishoyosama]

If I have a user input like that
abcdabcdacdabab
and the user although insert a character like that
ab
And want to output the number of duplicates of this character how can I do that
and thanks for the video

[samcob]

Hello, Thank you for sharing this video, it is really helpful...

[Adam-gpij]

TOO MUCH COMPLICATED !you could use only 3 lines of code Sir