A class Capital has been defined to check whether a sentence has words beginning with a capital…

import java.util.Scanner;
import java.util.StringTokenizer;

class Capital
{
    String sent;
    int freq;

    Capital()
    {
        sent = "";
        freq = 0;
    }

    void input()
    {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter a sentence:");
        sent = sc.nextLine();
    }

    boolean isCap(String w)
    {
        char ch = w.charAt(0);
        if (ch >= 'A' && ch <= 'Z')
            return true;
        else
            return false;
    }

    void display()
    {
        StringTokenizer st = new StringTokenizer(sent, " ,.");
        freq = 0;
        while (st.hasMoreTokens())
        {
            String w = st.nextToken();
            if (isCap(w))
                freq++;
        }
        System.out.println("Sentence : " + sent);
        System.out.println("Frequency of words beginning with a capital letter : " + freq);
    }

    public static void main(String args[])
    {
        Capital ob = new Capital();
        ob.input();
        ob.display();
    }
}