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Norm my professor says to
Display the object by invoking its toString method.

How do I do that? I just displayed it using print statement but how do I do it with toString?

Some one help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Here is the full error message in Bold

Public method isOn cannot be applied to given types;
required: boolean
found: no arguements
reason: actual and formal arguement lists differ in length

This is my assignment
Write a class named Fan to model fans. The properties are speed, on, radius, and color. You need to provide the accessor methods for the properties, and the toString method...