java - Guidance on creating an instance for a class with boolean

Question

I'm currently trying to create an instance from a different file and the class has a boolean. I've tried calling it a couple different ways, but I'm unable to get the results I'm seeking. This is how the class starts below:

 public boolean buyFunction(int balance, double amountSpent)

Here's one of the instances I've tried creating

boolean buyFunction buy = buyFunction();
        

I just get the error message

error: ';' expected
        boolean buyFunction buy = buyFunction();

question from:https://stackoverflow.com/questions/65909220/guidance-on-creating-an-instance-for-a-class-with-boolean

Answer 1

Firstly, buyFunction(int balance, double amountSpent) is a method, not a class. Secondly:

boolean buyFunction buy = buyFunction();

Looks like it has two names, which a variable can't have. Also, when you called the method, you did not pass in an int, and a double. Also, to call the method without an instance of a class, you'd have to instantiate the object.

Here is something that could work:

YourClassName y = new YourClassName();

boolean buy = y.buyFunction(500, 45.50);

Now if you don't want to make an object, and just call the function, you could make use the static keyword:

 public static boolean buyFunction(int balance, double amountSpent)

Now you can call it like this:

boolean buy = buyFunction(500, 45.50);

This would pass 500 to the balance parameter, and 45.50 to the amountSpent parameter.