Question

Design a class VowelWord to accept a sentence and calculate the frequency of words that begin with a vowel . The words in the input string are separated by a single blank space and is terminated by a full stop. The description of the class is given below:

Classname:VowelWord

Data members / instance variables:

str : to store a sentence

freq : store the frequency of the words beginning with a vowel

Member functions:
VowelWord( ): default constructor to initialize data member to legal initial value

void readstr(): to accept a sentence

void freq_vowel(): counts the frequency of the words that begin with a vowel

void display(): to display the original string and the frequency of the word that begin with a vowel

Specify the class VowelWord giving details of the constructor( ), void readstr( ) , void freq_vowel() and void display() . Also define the main() function to create an object and call the methods accordingly to enable the task.

Share code with your friends

Code

				
					import java.util.Scanner;
public class VowelWord
{
    String str;
    int freq;
    public VowelWord()
    {
        str="";
        freq=0;
    }
    public void readstr()
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("enter a string");
        str=sc.nextLine();
    }
    public void freq_vowel()
    {
        char ch,ch1=' ';
        for(int i=0;i< str.length();i++)
        {  
            ch=str.charAt(i);
            if(i==0)
            {
                if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u'||ch=='A'||ch=='E'||ch=='I'||ch=='O'||ch=='U')
                {
                    freq++;
                }
            }
            else if(ch==' ')
            {
                ch1=str.charAt(i+1);
                if(ch1=='a'||ch1=='e'||ch1=='i'||ch1=='o'||ch1=='u'||ch1=='A'||ch1=='E'||ch1=='I'||ch1=='O'||ch1=='U')
                {
                    freq++;
                }    
            }
        }
    }
    
    void display()
    {
        System.out.println("ORIGINALSENTENCE:  "+str);
        System.out.println("FREQUECY OF WORD BEGINNING WITH A VOWEL "+freq);
    }
    public static void main()
    {
        VowelWord ob1=new VowelWord();
        ob1.readstr();
        ob1.freq_vowel();
        ob1.display();
    }
}