import java.util.*;
import java.lang.*;
 
class Main {
	private static Map<Integer, String> members = new HashMap<Integer, String>();
 
	private static void addMember() {
		Scanner sc = new Scanner(System.in).useDelimiter("\n");
		while (true) {
			try {
				System.out.println("Please enter a membership number: ");
				int mNum = sc.nextInt();
				System.out.println("Please enter the member's name: ");
				String mName = sc.next();
				members.put(mNum, mName);
			} catch (Exception e) {
				break;
			}
		}
	}
 
	public static void main(String[] args) throws java.lang.Exception {
		addMember();
		System.out.println(members);
	}
}

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42
Bobby Tables
-1
Barack Obama