Question

In Java write a program that asks user’s name, records it in memory, prints the number of times it saw the name since it was last started and goes back to asking user’s name.

Answer 1

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class NameCounts {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        Map<String, Integer> map = new HashMap<>();
        String name;
        while (true) {
            System.out.print("Enter a name(empty string to exit): ");
            name = in.nextLine();
            if (name.isEmpty())
                break;
            if (!map.containsKey(name)) {
                map.put(name, 0);
            }
            map.put(name, map.get(name)+1);
            System.out.println("Number of times " + name + " is seen is " + map.get(name));
        }
    }
}