Hi Friend,

import java.util.*;

public class InitialName {
        public static void main(String[] args) {
                Scanner input = new Scanner(System.in);
                System.out.print("Input Name: ");
                String str = input.nextLine();
                String st[] = str.split(" ");
                char ch[] = new char[st.length - 1];
                for (int i = 0; i < st.length - 1; i++) {
                        ch[i] = st[i].charAt(0);
                }
                int len = st.length;
                for (int i = 0; i < ch.length; i++) {
                        System.out.print(ch[i] + ".");
                }
                System.out.print(st[len - 1]);
        }
}

Thanks