# Objects and class objects cannot be converted?
**URL:** https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276
**Category:** Beginners
**Created:** [January 23, 2020, 5:05am UTC](https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276 "2020-01-23T05:05:26Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Edudmas](https://discourse.processing.org/u/Edudmas)
#### Post date: [January 23, 2020, 5:05am UTC](https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276/1 "2020-01-23T05:05:26Z")
I don’t want to muck up the page, so there will be a pastebin at the bottom with my code on it.
I am trying to create a HashMap and create multiple objects of a ‘Car’ class depending on the variable entered into my ‘Traffic’ class. But I get an error on line 28 saying “Type mismatch: cannot convert to Object to traffic.Car.” How do I solve this issue?
Traffic class: [https://pastebin.com/yyFsnEhn](https://pastebin.com/yyFsnEhn)
Car class: [https://pastebin.com/pUq8rLMg](https://pastebin.com/pUq8rLMg)
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### Author:  [@GoToLoop](https://discourse.processing.org/u/GoToLoop)
#### Post date: [January 23, 2020, 5:50am UTC](https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276/2 "2020-01-23T05:50:36Z")
Replace `private Map cars = new HashMap();`
w/ `final Map cars = new HashMap();`
> [@2D Array of TreeMaps wont access the intValue()](https://discourse.processing.org/t/2d-array-of-treemaps-wont-access-the-intvalue/17245/2):
>
> If you know how many you’re gonna need, you can simplify things a lot by choosing a vanilla array. You didn’t specify the generic datatypes for your TreeMap: Which seems like it is the pair color & int. So, their corresponding wrapper type is Integer: final TreeMap\[] colourRanges = new TreeMap[7];
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### Author:  [@Edudmas](https://discourse.processing.org/u/Edudmas)
#### Post date: [January 23, 2020, 12:17pm UTC](https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276/3 "2020-01-23T12:17:50Z")
Thanks! I am trying to make it so that the quantity of the Car objects are controlled by a single variable from the traffic class.
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### Author:  [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)
#### Post date: [January 23, 2020, 10:55pm UTC](https://discourse.processing.org/t/objects-and-class-objects-cannot-be-converted/17276/4 "2020-01-23T22:55:21Z")
> [@Edudmas](#):
>
> I don’t want to muck up the page
FYI, you can embed code blocks of any length, and they will become scrollable and syntax highlighted as long as you [format your code](https://discourse.processing.org/faq#format-your-code).