Key to Value associations

Question

What I am trying to do is create cars, assign a name to each car created.

Below is what I have done:

//.....codes
         


        

Answer 1

You are assuming that the name of the car is the second instruction:

       boolean blnExists =carNames.containsKey(instructions[1]);

but that is correct only for a 'car' command. For the other commands, the name of the car is the first instruction.

You also have an issue here:

           if (instructions[1].equals("build")){
               car.makeVisible();
              }

Variable car does not reference the car with the given name (you only checked its existence -- you didn't actually retrieve it yet), so the output will not correspond to that car.

There are some other strange things about your code, but nothing that I recognize as erroneous on a quick read-through.