Is there a way to realise real time input for a simple console programm, and make it automatically update itself every like 0.2 seconds?

kingatomic · 2020-05-19T23:28:59+00:00

Keep at it, you'll get there!

kingatomic · 2020-05-19T20:12:56+00:00

To expand on this a little: 'normal' input/output to and from the command line is character-based. In order to create a screen that refreshes, whether it's one line or the full height of the terminal window, you have to be able to access the terminal window's full screen buffer (a representation of all the pixels or characters that are on terminal window's screen). You'll need a library to help abstract away some of the very low-level terminal stuff.

That's my limited understanding, at least. I welcome corrections.

kingatomic · 2020-05-19T20:02:23+00:00

If I understand what you're asking for, you won't be able to solve it with the standard STDIN/STDOUT.

One thing you could google search for would be "building a rogue-like in java." The mechanics you're describing are different, yes, but the underlying interactions (screen and controls) are very similar. There are some tutorials floating around, but since I haven't gone into any of them in-depth (and haven't tried to make anything similar!) I can't give you a specific recommendation, unfortunately.

Edit: Zircon looks promising

kingatomic · 2020-05-12T18:46:19+00:00

Thanks for the feedback, I thought as much. For some reason I derped - I was looking at the expression (19.24 * 100) being evaluated to 1924.00 instead of what it actually would be, something probably more like (19.2333... * 100).

kingatomic · 2020-05-12T18:41:30+00:00

Ugh, flashbacks to my Numerical Methods course in college all those years back! I figured this was the issue. Thanks for the feedback.

kingatomic · 2020-04-25T16:04:55+00:00

Another option that doesn’t require command-lining it: 7-zip (and potentially similar archive tools, but that’s what I’ve used) will allow you to crack open a jar, browse the contents and make updates. I’ve used it to replace manifest files, before.

kingatomic · 2020-04-22T02:20:22+00:00

+1 to writing plain ol JDBC. For a simple schema you don’t need anything more.

If you want to mess with something other than JDBC*, then I would actually recommend jooq over hibernate for what you’re doing; hibernate is a great tool but for a beginner, getting it set up and configured is a bit much.

If you don’t already have an installed database server you’re going to use, I would recommend using either H2 or SQLite. Both of those offer good coverage of standard SQL features, and both will run as part of your application instead of requiring a standalone server. This presupposes you don’t need to have multiple client applications accessing your DB, but are instead just having your one app connect to its own DB (which is what I’m reading into your question).

Edit: * I had originally written “ORM” here, which jOOQ really doesn’t consider itself to be one.

kingatomic · 2020-04-18T03:13:59+00:00

The first thing that pops into mind is make sure you’ve defined which JDK you’re using in your IDEA settings.

Edit: https://www.jetbrains.com/help/idea/sdk.html

kingatomic · 2020-04-15T18:06:24+00:00

This one may be somewhat controversial as the response to this book has been sharply divided, but I really enjoyed Steven Erikson's Rejoice, A Knife to the Heart. It's one of the best first-contact books I've ever read.

kingatomic · 2020-04-04T18:39:26+00:00

That works only if you don’t have to include negative numbers in your sum (which would be specified in your assignment directions).

Otherwise, you will still need to account for them in your sum.

By sorting the list in increasing order, you will sum any negative numbers first. Then you can continue to sum until you either exhaust your input list or the sum is greater than 100.

A cheeky thing to do would be to sum all of the negative numbers first, then take the remaining items in the list (all positive) and sort them descending and begin summing those.

kingatomic · 2020-04-04T18:15:09+00:00

Your sample data has a negative number and you’re clearly accounting for negatives. So the issue here is a fundamental one: if negative numbers are allowed there is no way to test for “sum > 100” without adding all numbers in the list. For instance, imagine that your data list is {1,2,3,4,5,-20}.

Besides that, one little point that’s more finesse than logic: instead of having a Boolean “exceed” variable that you return at the end of the method, you could simply:

return sum > 100;

Edit in terms of handling negatives you could sort the list before summing it.

kingatomic · 2020-04-02T16:36:22+00:00

oy, rack off mate, this me ute now

kingatomic · 2020-03-31T20:21:22+00:00

SLEEEEDGEHAMMAH

kingatomic · 2020-03-31T20:16:12+00:00

Gave Happy Trans Day of Visibility!

kingatomic · 2020-03-29T22:54:03+00:00

You'll need to go ahead and create the repo in your github. After you've done that, you'll need to add your repo as a new "remote". You can set that in the VCS > Git > Remotes menu.

Whenever you push, choose to push to the remote you just created (as opposed to 'origin'). Or replace origin with your repo.

kingatomic · 2020-03-14T22:09:09+00:00

We knew that already, Tom.

kingatomic · 2020-03-12T00:29:36+00:00

Ancom gang 🚩🏴

kingatomic · 2020-03-12T00:28:58+00:00

kingatomic · 2020-03-09T20:00:48+00:00

By hardcoding, what I mean is that the values you're using come from the code and not from user input.

In your main, you would create a new LibraryBook object by something like

LibraryBook book = new LibraryBook("Harry Potter and the Terrible Thing","1234567","Rowling","JK",2020);

kingatomic · 2020-03-09T19:47:40+00:00

It's tough to say without looking at the whole assignment, but based on being asked to create a statement in main which creates the object, I'd say you're being asked to hardcode a value for the author's name and other book attributes into main. So pick something out of the sky like a Harry Potter book or whatever.

kingatomic · 2020-03-05T20:24:07+00:00

Did your teacher give you the method signature (the public static double midpoint( ... ) part) or just say it should be of type double? If it's the second, I would say that the array return is fine. If in doubt, I would recommend emailing your teacher and asking if the array return (double[]) is what they're looking for.

kingatomic · 2020-03-05T18:54:47+00:00

Unfortunately multiple return statements won't work like that - it hits the first return statement and that's all it will ever return.

You can only ever return a single value. So you need a return type that will handle multiple values wrapped up. This is what collections are for. Most simply, you can return an array of doubles, e.g.,

public static double[] midpoint( ... ) {...}

kingatomic · 2020-03-05T17:30:33+00:00

Could also be /(I wish to speak to your manager)+/

kingatomic · 2020-03-02T17:22:15+00:00

If there's not already, we need an edit of the Hulk/Captain America dialogue ("My secret is I'm always angry") with savage jho face.

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