Creating an arraylist of multiple different objects [closed]

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How do i create an arraylist of many DIFFERENT OBJECTS and add their references. So like shape.add(new Rectangle(3, 2)); and like shape.add(new RightTriangle(2, 4).

Realistically these shapes should inherit from a Shape class/interface. Then you can use an array list of shapes, not objects. — Henry Twist
– Henry Twist, Commented May 9, 2021 at 15:38
Does this answer your question? Creating instance list of different objects — Henry Twist
– Henry Twist, Commented May 9, 2021 at 18:53

Toshimichi · Accepted Answer · 2021-05-09 15:54:50Z

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If you can't make an interface for these classes, you can use wildcard

ArrayList<?> shapes = new ArrayList<>();
shapes.add(new WhateverYouWant());

answered May 9, 2021 at 15:54

Toshimichi

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2 Comments

Mike Over a year ago

So with that I can put anything I want meaning different objects like the shapes for example and it not throw an error at me

Henry Twist Over a year ago

Yes but there's not much point in this approach, when you retrieve them you won't be able to call any relevant methods etc. So they might as well not be in an array in the first place.

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