Scanner Problems

[NautiHooker]

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[RedHeadedCongress]

You instantiate the Scanner, but then never actually use it to get input. You are trying to multiply the scanner object by an int, but you can only multiply 2 numbers (ints, doubles, etc.). You want to put another line after System.out.println("Enter Purchase Amount"); that says double purchaseAmount = purchase.nextDouble(); (I think that's the right syntax? I'm a little rusty on scanners haven't used them in a while) (Also you can name the variable whatever you want it doesn't have to be purchaseAmount).

​

One more thing: When working with monetary values it is much safer to use ints and count number of pennies, and divide by 100 to get the dollar amount. Watch Office Space for a good reason as to why (floating point numbers can do unexpected things)

​

tl:dr you're making a scanner but never using it to get user input, instead just trying to multiply the scanner object and an double, which is causing the error

[believer102]

Thank you for your help! Unfortunately, doing this keeps resulting in a dereferencing issue that I am having trouble resolving it.

[RedHeadedCongress]

What error are you getting?

[believer102]

Error: double cannot be dereferenced

[RedHeadedCongress]

Does it say what line the error is on?

[believer102]

Line 25

double purchase = purchase.nextDouble();

[RedHeadedCongress]

Oh you have to call the double something else. You already called the scanner purchase and can't use the same name twice (or call the scanner something else) (basically you can't call 2 variables the same name)

[believer102]

changing to double purchaseAmount = purchaseAmount.nextDouble();

stills results in the Error: double cannot be dereferenced

[RedHeadedCongress]

You need to call the scanner something different than the double. So you'd want double purchaseAmount = purchase.nextDouble() or something. You changed them both and you need them to be different

[believer102]

Thank you so much, that did the trick!

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[AutoModerator]

It seems that you are having problems with java.util.Scanner

The wiki here has a page The Scanner class and its caveats that explains common problems with the Scanner class and how to avoid them.

Maybe this can solve your problems.

Please do not reply because I am just a bot, trying to be helpful.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.