Java How To - Character Frequency in a String
How To Count Character Frequency in a String
Use a HashMap to count how many times each character appears:
Example
import java.util.HashMap;
public class Main {
public static void main(String[] args) {
String text = "banana";
HashMap<Character, Integer> freq = new HashMap<>();
for (char c : text.toCharArray()) {
freq.put(c, freq.getOrDefault(c, 0) + 1);
}
System.out.println(freq);
// Output: {a=3, b=1, n=2}
}
}
