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Java Program to Find Frequency of a Given Character in a String
This article is created to cover a program in Java that find and prints the frequency or the occurrences of a given character in a given string. For example, if given string is fresherearth and character is c, then the output will be 3, because 'c' occurs 3 times in the string "fresherearth".
The question is, write a Java program to find frequency of a character in a string. Both character and string must be received by user at run-time of the program. The program given below is the answer to this question:
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { String str; char ch, strCh; int strLen, i, count=0; Scanner s = new Scanner(System.in); System.out.print("Enter the String: "); str = s.nextLine(); System.out.print("\nEnter a Character to Find its Frequency: "); ch = s.next().charAt(0); strLen = str.length(); for(i=0; i<strLen; i++) { strCh = str.charAt(i); if(ch==strCh) count++; } System.out.println("\nFrequency = " +count); } }
Here is its sample run with user input fresherearth as string and c as character to find its frequency:
The above program can also be created/written in this way:
import java.util.Scanner; public class fresherearth { public static void main(String[] args) { int strLen, i, count=0; Scanner s = new Scanner(System.in); System.out.print("Enter the String: "); String str = s.nextLine(); System.out.print("\nEnter a Character to Find its Frequency: "); char ch = s.next().charAt(0); for(i=0; i<str.length(); i++) { if(ch==str.charAt(i)) count++; } if(count==0) System.out.println("\nThe character \'" +ch+ "\' is not found in the String."); else System.out.println("\nThe Frequency of character \'" +ch+ "\' = " +count); } }
Here is its sample run with user input fresherearth dot com as string and c as character to find its frequency or occurrences:
Here is another sample run with user input Java is fun as string and b as character:
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