In this tutorial you will learn about the Java Program to Find the Frequency of Character in a String and its application with practical example.
In this tutorial, we will learn to create a Program that will Find the Frequency of Character in a String using java programming.
Prerequisites
Before starting with this program we assume that you are best aware of the following Java programming topics:
- Java Operators.
- Basic input/output.
- Basic Java programming.
- Array and Multidimensional Array.
- Loops in python.
- String in python.
- Nested For loop.
- Class and object.
What Is frequency of occurrence of a character?
Frequency means to find and count given character present in the string. i.e Total number of occurrence of a particular character in a given string.
Java Program to Find the Frequency of Character in a String
In this program we will find frequency of a given character will be calculated.First of all a string and a character to find the frequency of given character is to set.later we will find frequency of a given character in a string.
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public class Occurence { public static void main(String[] args) { String s = "https://www.w3adda.com"; char ch = 'a'; //Declaring variables.. int freq = 0; for(int i = 0; i < s.length(); i++) { if(ch == s.charAt(i)) // Finding frequency.. { ++freq; } } System.out.println("Frequency of " + ch + " = " + freq); } } |
Output
In the above program, we have first declared and initialized a set variables required in the program.
- s = it will hold given string.
- ch = it will hold a finding character.
- i= for iteration.
- freq= it will count total number of occurrence of a character.
Values of string and a character will be assigned to variable ‘s’ and in ‘ch’ respectively. Now we will loop through the size of a string using length() function . In each iteration we will compare string to given character to find the occurrence of a character and each matching condition we increase the counter value by one as shown in below image.
This process will continue until loop ends , and at last we will print the total number occurrence of a given character.
This is the process of finding the frequency of occurrence of a character in a String.
