Question

Input a sentence from the user and count the number of times, the words “an” and “and” are present in the sentence. Design a class Frequency using the description given below: 

Class name: Frequency 

Data members/variables: 

text: stores the sentence 

countand: to store the frequency of the word “and” 

countan: to store the frequency of the word “an” 

len: stores the length of the string Member functions/methods:

Frequency(): constructor to initialize the instance variables 

void accept(String n): to assign n to text, where the value of the parameter n should be in lower case. 

void checkandfreq(): to count the frequency of “and” 

void checkanfreq(): to count the frequency of “an” 

void display(): to display the number of “and” and “an” with appropriate messages. 

Specify the class Frequency giving details of the constructor(), void accepts(String), void checkandfreq(), 

void checkanfreq() and void display(). Also, define the main() function to create an object and call methods accordingly to enable the task.

Answer 1

Class frequency 

{ 

String text; 

Public int countand; 

Public int countan: 

Public int len; Frequency() 

{ text = "countand = 0; 

countan = 0: len = 0; 

} 

void accept(String n) 

{ 

n = text:

} 

void check and freq() 

{ 

String S = " "; 

countand = 0 ; 

len = n. length(); 

for (int i = 0; i < len; i++) 

{ 

char b = n. charAt(i); 

if(b = = ' ') 

{ 

if (S = = "and'') 

{

countand = countand + 1; 

} 

S = " "; 

} 

else S = S+b; 

} 

} 

} 

void checkanfreq() 

{ String S1 = " "; 

countan = 0; 

len = n. length ( ) 

for (int i = 0; i < n; i++) 

{ char b = n.charAt(i); 

if (b = = ' '); 

{ if (S1 == "an") 

{ 

countan = countan + 1; 

} 

S1 = " "; 

} 

else 

{ 

S1 = S1 +b; 

} 

} 

}

void display() 

{ 

System.out pri nl n(' 'Frequency of'and' in the sentence is'' + countand); 

System.out.println(''Frequency of 'an' in the sentence is'' + countan); 

}