Write a method called isAllVowels that returns whether a string consists entirely of vowel...

Complete Program Code:

NOTE: The following executable program code is used to call the above method “isAllVowels” in multiple times and print the final results as on screen.

//Create a main class name, "VowelsDemo"

public class VowelsDemo

{

// Method definition of “isAllVowels”

public static boolean isAllVowels(String string)

{

// Check if the string is empty and return true

if (string.equals(""))

{

return true;

}

// Check each character in the String

// whether its vowel or not. Also if string is

// empty control will directly go to the return

// statement after for loop

for (int i = 0; i < string.length(); i++)

{

// Get individual character in char

char c = string.charAt(i);

// If character is a vowel proceed and check // next character else return false

if (c == 'a' || c == 'e' || c == 'i' ||

c == 'o' || c == 'u' || c == 'A' ||

c == 'E' || c == 'I' || c == 'O' ||

c == 'U')

{

continue;

}

else

{

return false;

}

}

// If no consonant is found then only the

// program control will reach here and true

// will be return (all characters are vowels)

return true;

}

// main method

public static void main(String[] args)

{

//Call the method isAllVowels with string "eIEio"

//and display the result

System.out.println("isAllVowels(\"eIEio\") "

+ " returns "+isAllVowels("eIEio"));

//and display the result

System.out.println("isAllVowels(\"oink\")"

+ "returns "+isAllVowels("oink"));

//Call the method isAllVowels with empty string

//and print the result

System.out.println("isAllVowels(\"\")"

+ " returns "+isAllVowels(""));

}

}

Sample Output: