CODEWITHSUNDEEP
java
DragonAge99
DragonAge99

Reputation: 39

Methods and Strings

I am new to Java programming. My homework problem states that to Write a program that calls a method to print the number of vowels in a sentence (use ‘nextLine()’to read a sentence instead of a single word). Print the number of occurrences of each vowel (ie: the number of ‘a’s, the number of ‘e’s, etc.) Here is my program so far

public static void main(String[] args) {
  Scanner in = new Scanner(System.in);

  System.out.println("Enter a string");
  String str = in.nextLine();


  System.out.println("The number a vowels in the sentence are" + vowel(str));
}

  public static String vowel(str)//I'm having trouble here
{
    int len = str.length(); // Here
    int count = 0;
    for (int i = 0; i < len; i++)
    {
       char str2 = str.charAt(i);//Here
       if (str2 == 'a')
       count++;    
    }
       return str2; // And finally here
 }

Upvotes: 0

Views: 118

Answers (3)

Uwe Allner
Uwe Allner

Reputation: 3467

You cannot return str2 after the for-loop, because you declared it inside, and it is invalid outside. Also it has a different data type than the method (String vs char).

Upvotes: 0

Elfentech
Elfentech

Reputation: 747

Also, use an array to stock the occurence of voyels, to handle the result easier.

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1500665

The problem is with your method declaration. You need to declare the type of your str parameter, like this:

public static String vowel(String str)

Additionally, you're only declaring str2 within your loop - so you can't use it for the return statement (which is outside the loop). Given that you're trying to return a count of vowels, you should change the return type to int anyway... and then return count, not str2:

public static int vowel(String str) {
    ... code as before apart from last line...
    return count;
}

Upvotes: 10

Related Questions