6. Java Program to Count Frequency of Each Character in a String | String Interview Question

Published: 11 July 2025
on channel: RandomCoding

In this video, you’ll learn how to count the frequency of each character in a string using Java. We use a simple and effective approach with HashMap to solve this common string problem.

Perfect for Java beginners, coding interview prep, or anyone brushing up on string manipulation in Java.

✅ What you'll learn:

How to use HashMap to count characters

How to convert a string to a character array

Java for-each loop for character processing

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