Apr You can use a java Map and map a char to an int. You can then iterate over the characters in the string and check if they have been added to the map, if they have, you can then increment its value. At the end you will have a count of all the characters you encountered and you can extract their frequencies from that. MarLetter Frequency - Stack Overflow answers MarCounting the frequency of alphabet letters in a String.
MayMorefrom stackoverflow. Converts given string into character array.
Example: Find Frequency of Character In the above program, the length of the given string, str, is found using the string method length(). We loop through each character in the string using charAt() function which takes the index ( i ) and returns the character in the given index.