Question

In Java, write a program that prompts the user to input a sequence of characters and outputs the number of vowels. You will need to write a method to return a value called isAVowel which will return true if a given character is a vowel and returns false if the character is not a vowel. A second method, called isAConstant, should return true if a given character is a constant and return false if the character is not a constant. Set the program to discard case.

Sample:

Please enter a string of characters: Little Miss Muffet sat on her tuffet.

The string “Little Miss Muffet sat on her tuffet” contains 20 constants and 10 vowels.

Would you like to enter a new string (y/n)?

Answer 1

Here is your answer:

public class VowelConstant{

public static boolean isAVowel(char c){
boolean flag = false;
switch (c) {
case 'a':
case 'e':
case 'i':
case 'o':
case 'u':
flag = true;
break;
default:

}
return flag;
}

public static boolean isAConstant(char c){
boolean flag = false;
switch (c) {
case 'a':
break;
case 'e':
break;
case 'i':
break;
case 'o':
break;
case 'u':
break;
default:
flag = true;
break;

}
return flag;
  
}
public static void main(String []args){
  

java.util.Scanner scanner = new java.util.Scanner(System.in);

System.out.print("Please enter a string of characters : ");

  
String inputString = scanner.nextLine();
char[] letters = inputString.replaceAll("\\s","").toCharArray();
int vowelCount = 0;
int constantCount = 0;
for (char c : letters) {
if(isAVowel(c)) {
vowelCount++;
}
if(isAConstant(c)){
constantCount++;
}
}
System.out.println("The string "+ inputString+ " contains " +constantCount+" Consatants "+vowelCount + " Vowels ");
}
}