A = 7
B = 8

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

public class Commander
{
    public static void main(String[] args)
    {
        Map<String,Integer> expression = new HashMap<String,Integer>();

        Scanner sc = new Scanner(System.in);
        String Variable, assignmentOperator;
        int Value, i = 0;

        while(true)
        {
            args[i] = sc.nextLine();
            args[i + 1] = sc.nextLine();
            args[i + 2] = sc.nextLine();

            expression.put(args[i],Integer.parseInt(args[i + 2]));

            for(String key: expression.keySet())
                System.out.println(key + " - " + expression.get(key));

            if(!sc.hasNextLine()) break;

            ++i;

        }
    }
}

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
    at Commander.main(Commander.java:17)