need help

[marc]

hi

i have a problem in my code
i shoud make it by switch,if or if else

i tried switch but doesn't work and this is my code
i don't know what shoud i do with str2 and str3

i'm not strong in it
could you please help me

import java.util.*;
public class E3
{
static Scanner console = new Scanner (System.in);
public static void main(String [] args )
{

int len, counterV, counterS;
String str2;
counterV = 0;
counterS = 0;
String str, str3;
len = str.length();

str3 =" "+(char)str.charAt(len/2-5)+(char)str.charAt(len/2-4)+(char)str.charAt(len/2-3)+(char)str.charAt(len/2-2)+(char)str.charAt(len/2-1)+(char)str.charAt(len/2)+(char)str.charAt(len/2+1)+(char)str.charAt(len/2+2)+(char)str.charAt(len/2+3)+(char)str.charAt(len/2+4);
str2 = (char)str3.substring(str.charAt(len/2-5),str.charAt(len/2+4));
System.out.println(" Enter string consist of more than or equal  10 letters :");
str = console.next();

switch (str2)
{
case 'a':
counterV++;
case 'e':
counterV++;
case 'i':
counterV++;
case 'u':
counterV++;
case 'o':
counterV++;
break;

case '@':
counterD++;
case '?':
counterD++;
case '!':
counterD++;
case '$':
counterD++;
case '#':
counterD++;
break;
}}}

[marc]

Sorry i forget the Q


Write a program to read a (not less than 10 letters) string (str) and in the middle 10 characters of the string, count the number of vowel letters(cap or small) : (e, i,a ,o,u ), and number of these special_symbols : (? , $, #, @, !) .
Example 1 :
Input : str =
N o ! o n e @ K S U ? w h y ?
output :
Number of vowels = 3
Number of special symbols = 2

Example 2 :
Input : str =
H i I T @ C C I S ! ?
output :
Number of vowels = 3
Number of special symbols = 1

[gcalvin]

Your sample output looks wrong to me:

Example 1 :
Input : str =
N o ! o n e @ K S U ? w h y ?
output :
Number of vowels = 3
Number of special symbols = 2

Looks like 4 vowels and 4 special symbols to me.

Example 2 :
Input : str =
H i I T @ C C I S ! ?
output :
Number of vowels = 3
Number of special symbols = 1

And this one looks like 3 vowels and 3 special symbols.

Anyway, your code initializes a variable counterS, but then you try to use counterD. You are casting a bunch of things to be char that are already char. You're trying to pass char parameters where ints are expected. Your switch logic for values is considering lower-case vowels only.

You should write two methods like this:

        private static boolean isVowel(char c) {
                // TODO: return true if char c is a vowel, false otherwise
        }

        private static boolean isSpecialCharacter(char c) {
                // TODO: return true if char c is a "special" character, false otherwise
        }

Then your main method can be much simpler.

        get String from user
        initialize numVowels and numSpecialChars to 0
        for each char in the String
                // use the methods you wrote above
                if char is a vowel, increment numVowels
                if char is a special character, increment numSpecialChars
        print the output

Don't forget to make sure that isVowel() works for upper or lower case letters.

-Gary-