Class 12

Words Beginning with Capital Letter

A class Capital has been defined to check whether a sentence has words beginning with a capital letter or not.

Some of the members of the class are given below:

Class name: Capital
Data members/instance variables:
sent: to store a sentence.
freq: stores the frequency of words beginning with a capital letter.
Member functions/methods:
Capital(): default constructor.
void input(): to accept the sentence.
boolean isCap(String w): checks and returns true if word begins with a capital letter, otherwise returns false.
void display(): displays the sentence along with the frequency of the words beginning with a capital letter.

Specify the class Capital, giving the details of the constructor, void input(), boolean isCap(String) and void display(). Define the main() function to create an object and call the function accordingly to enable the task.


import java.util.StringTokenizer;
class Capital{
    private String sent;
    private int freq;
    public Capital(){
        sent = new String();
        freq = 0;
    public void input()throws IOException{
        InputStreamReader in = new InputStreamReader(;
        BufferedReader br = new BufferedReader(in);
        System.out.print("Sentence: ");
        sent = br.readLine();
    public boolean isCap(String w){
        char ch = w.charAt(0);
            return true;
        return false;
    public void display(){
        StringTokenizer st = new StringTokenizer(sent, " ,?!.");
        int count = st.countTokens();
        for(int i = 1; i <= count; i++){
            String word = st.nextToken();
        System.out.println("Sentence: " + sent);
        System.out.println("Frequency: " + freq);
    public static void main(String args[])
    throws IOException{
        Capital obj = new Capital();

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