Count number of vowels, consonants and digits in a String in Java
By: Paawan Chaudhary in Java Tutorials on 2012-09-19
This java program accepts a string from the console and counts number of vowels, consonants, digits, tabs and blank spaces in a string.
import java.io.*;
class q5vowels
{
public static void main(String args[]) throws IOException
{
String str;
int vowels = 0, digits = 0, blanks = 0;
char ch;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter a String : ");
str = br.readLine();
for(int i = 0; i < str.length(); i ++)
{
ch = str.charAt(i);
if(ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' ||
ch == 'I' || ch == 'o' || ch == 'O' || ch == 'u' || ch == 'U')
vowels ++;
else if(Character.isDigit(ch))
digits ++;
else if(Character.isWhitespace(ch))
blanks ++;
}
System.out.println("Vowels : " + vowels);
System.out.println("Digits : " + digits);
System.out.println("Blanks : " + blanks);
}
}
Output:
Enter a String : ABC DE 123 Vowels : 2 Digits : 3 Blanks : 2
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