Java gui question | Together Java | Page 1

pine tide Jan 20, 2024, 7:14 PM

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I have an assignment thats about a book reccomendation system but my question is just is there a way to display stuff through like a popup scroll type thing java gui?

paper bobcatBOT Jan 20, 2024, 7:14 PM

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<@&987246717831381062> please have a look, thanks.

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Here is an AI assisted attempt to answer your question 🤖. Maybe it helps! In any case, a human is on the way 👍. To continue talking to the AI, you can use </chatgpt:1108714622413963314>.

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Yes, both JavaFX and Swing provide components that can be used to display content in a popup scrollable window.

In JavaFX, you can use the ScrollPane class to create a scrollable area. You can add any content you want to the ScrollPane, such as labels, buttons, or even other containers like VBox or GridPane. Here's an example:

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import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class PopupScrollExample extends Application {
    @Override
    public void start(Stage primaryStage) {
        ScrollPane scrollPane = new ScrollPane();
        VBox content = new VBox();
        
        // Add some labels to the VBox
        for (int i = 1; i <= 20; i++) {
            Label label = new Label("Label " + i);
            content.getChildren().add(label);
        }
        
        scrollPane.setContent(content);
        
        Scene scene = new Scene(scrollPane, 300, 200);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

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In Swing, you can use the JScrollPane class along with other components like JPanel, JLabel, etc. Here's an example:

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import javax.swing.*;
import java.awt.*;

public class PopupScrollExample {
    public static void main(String[] args) {
        JFrame frame = new JFrame("Popup Scroll Example");
        
        JPanel content = new JPanel();
        
        // Add some labels to the panel
        for (int i = 1; i <= 20; i++) {
            JLabel label = new JLabel("Label " + i);
            content.add(label);
        }
        
        JScrollPane scrollPane = new JScrollPane(content);
        
        frame.getContentPane().add(scrollPane);
        frame.setSize(300, 200);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}

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Both examples will create a window with a scrollable area that displays a series of labels. You can customize the content and appearance according to your requirements.

pine tide Jan 20, 2024, 7:14 PM

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i have this

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to show all my books

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but it runs out of space so

pine tide Jan 20, 2024, 7:15 PM

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paper bobcat ```java import javax.swing.*; import java.awt.*; public class PopupScrollExampl...

how do i implement the information i want it to show

finite spindle Jan 20, 2024, 7:18 PM

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so you want a scrollable text window?

pine tide Jan 20, 2024, 7:18 PM

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yes !

finite spindle Jan 20, 2024, 7:18 PM

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using javafx or swing?

pine tide Jan 20, 2024, 7:18 PM

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to show all the books i have in my arraylist i guess

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um

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swing

finite spindle Jan 20, 2024, 7:19 PM

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pine tide to show all the books i have in my arraylist i guess

you want to show all book texts at the same time?

pine tide Jan 20, 2024, 7:19 PM

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well the scrollable window i want it to have all the books, so the user can just look at all of them

finite spindle Jan 20, 2024, 7:19 PM

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ah its not the texts its displaying but instead the name of the books?

pine tide Jan 20, 2024, 7:19 PM

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i Think so yea

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because theres like an infinite amount of books that could be added so

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idk how to display all of it

finite spindle Jan 20, 2024, 7:20 PM

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I think a scrollable text window is not a good idea for this though

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but instead a scrollable list

pine tide Jan 20, 2024, 7:20 PM

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Ok maybe that

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Idk my teacher showed a little snippet so Yeah i dont really know what i am looking for

finite spindle Jan 20, 2024, 7:21 PM

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in that case you want a JScrollPane which holds a JList

pine tide Jan 20, 2024, 7:22 PM

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Can you help a little with implementing it

finite spindle Jan 20, 2024, 7:23 PM

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your books have a dedicated class?

pine tide Jan 20, 2024, 7:24 PM

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i do have a book class but i cant say i found much use for it

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i have all my books in an arraylist

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the books are all in a file that was provided, so i read it and put the information in an arraylist

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using this

finite spindle Jan 20, 2024, 7:26 PM

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List<Book> books = new ArrayList<>();
// ...

DefaultListModel<Book> bookModel = new DefaultListModel<>();
bookModel.addAll(books);
JList<Book> bookList = new JList<>(bookModel);

JScrollPane pane = new JScrollPane(bookList);
// add to parent view

finite spindle Jan 20, 2024, 7:26 PM

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pine tide

why using io for reading files? why not using nio, which is used nowadays?

pine tide Jan 20, 2024, 7:26 PM

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idk it's what my teacher uses

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i have no clue what io or nio means

finite spindle Jan 20, 2024, 7:27 PM

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io -> input output, its the package that provides FileReader, BufferedReader etc

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nio -> new io, its a new package which provides easier and better ways of reading files and stuff

finite spindle Jan 20, 2024, 7:28 PM

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pine tide idk it's what my teacher uses

ok, tell him he should look past Java 8 pls

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Java 21 exist

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there is a lot of new stuff

pine tide Jan 20, 2024, 7:28 PM

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LOL okay

finite spindle Jan 20, 2024, 7:28 PM

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lmao

finite spindle Jan 20, 2024, 7:29 PM

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pine tide

also this looks like static abuse to me, why is the method not returning an arraylist? but instead using strLineBooks? which looks like being a static field

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also handle the IOException

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and use try with resource

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instead of manually closing

pine tide Jan 20, 2024, 7:29 PM

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finite spindle also this looks like static abuse to me, why is the method not returning an arra...

um because i have the array that i used in the method like

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its just up there

finite spindle Jan 20, 2024, 7:30 PM

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yeah thats most likely static abuse

pine tide Jan 20, 2024, 7:30 PM

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what does that mean

finite spindle Jan 20, 2024, 7:30 PM

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you shouldnt use static for everything

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thats bad

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especially in an OOP world

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also you dont need to specify the second generic in java

pine tide Jan 20, 2024, 7:31 PM

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why is that

finite spindle Jan 20, 2024, 7:31 PM

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List<String> list = new ArrayList<>();

pine tide Jan 20, 2024, 7:32 PM

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oh i see

pine tide Jan 20, 2024, 7:32 PM

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finite spindle especially in an OOP world

ok i cant say i will rewrite everything because its due tmrw but whats the difference

finite spindle Jan 20, 2024, 7:34 PM

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as soon as your codebase gets bigger and has multiple classes (using OOP practices) will run into desing issues

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I am not sure how deep you are into the topic OOP

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but you shouldnt use static like this

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abusing static for ease of access instead of creating proper flow and data management

pine tide Jan 20, 2024, 7:36 PM

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so if i were to redo again

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how would u read the files

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and store them in a data structure

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this is just what the file contains

finite spindle Jan 20, 2024, 7:37 PM

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public static void main(String[] args) {
    List<String> lines = readLines("...");
    // continue using them in your project, if a different class needs the list pass it through with constructor
}

private static List<String> readLines(String path) {
    // implementation
}

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also in this example you would simply use Files.lines()

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here your List is a variable inside your main method

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which makes it a local variable instead of public static

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and then you can continue like this:

// using records here is better
public class Book {
    // fields
    private final String name;
    private final String author;
    // ...

    public Book(String line) {
        // parsing the input line into the different fields
    }
}

and then:

public class Main {
    
    public static void main(String[] args) {
        List<Book> books = Files.lines(Path.of("...")).map(Book::new).toList();
    }
}

pine tide Jan 20, 2024, 7:42 PM

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Ok i dont really know what final is, havent learned map either or path.of

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i might be missing out on alot

finite spindle Jan 20, 2024, 7:43 PM

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those are just the modern ways of doing this

pine tide Jan 20, 2024, 7:43 PM

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Oh i see

finite spindle Jan 20, 2024, 7:44 PM

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those include the concepts of:

classes
access modifier
final
nio package
Streams
lambdas

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if interested

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also you should check your class names

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they should follow convention

paper bobcatBOT Jan 20, 2024, 7:44 PM

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The naming convention in Java is as follows:

Classes:
PascalCase. Example: GoldMiner, FoodDestroyer, DispenserBuilder

Methods / Fields / Variables:
camelCase. Example: foodAmount, integerValue, goodBoyAsADog

Packages:
All lowercase. Preferably the domain name backwards. Example: "google.com" ==> com.google, "ialistannen.me" ==> me.ialistannen
Followed by the project name. Example: Project "Builder" ==> com.google.builder

Constants/Enum entries:
UPPER_SNAKE_CASE. Where words are separated by underscores. Example: RED_DOG, I_AM_THE_BEST, CONQUER_WORLD

pine tide Jan 20, 2024, 7:46 PM

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Oh ok yeah thanks

finite spindle Jan 20, 2024, 7:47 PM

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anyways lets get back to your task, you still got any questions?

pine tide Jan 20, 2024, 8:11 PM

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No sir thank u

pine tide Jan 20, 2024, 9:28 PM

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finite spindle anyways lets get back to your task, you still got any questions?

Hello i am requesting assistance about something else related to my assignment

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So im working on having the user add a rating

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each button just means a different number

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but

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i need to add the rating for a specific member

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the rating, for the book, and for which user

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but im not sure how to logged in users, user

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because where i ask for is it in the login gui

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and then this is a different gui

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so i was like yea i probably need to use my member class

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so in my method where i add a user

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i decided to instantiate my member class

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but like how do i give it a unique name?

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because i was going to use this get method in my member class

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to access the logged in users, user

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ok yea idk im a little confused

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this is the only time i get the users name

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is there anyway i can access "strPass"

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ok well i tried this

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is this static abusing 😓

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actually i put this into my login

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and i did this

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pretty awesome..

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but static abusing 😓

finite spindle Jan 20, 2024, 10:12 PM

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might want to share the whole codebase

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so I can tell you what you would do differently

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in favor of OOP

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@pine tide

pine tide Jan 20, 2024, 10:26 PM

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Hello

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well i kind of figured it out i think

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it works ... afaik

finite spindle Jan 20, 2024, 10:26 PM

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so I can tell you what you would do differently
in favor of OOP

pine tide Jan 20, 2024, 10:26 PM

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Ok

pine tide Jan 20, 2024, 10:26 PM

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finite spindle might want to share the whole codebase

do i send u the files to it all or

finite spindle Jan 20, 2024, 10:27 PM

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you got a github repo?

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otherwise just send them here

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our bot will take care of it

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you shouldnt use zip files for sharing

pine tide Jan 20, 2024, 10:30 PM

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ok i just downloaded it

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from replit

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do i download the files seperately

finite spindle Jan 20, 2024, 10:31 PM

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just send them

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it doesnt matter

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the .java

pine tide Jan 20, 2024, 10:32 PM

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📎 frmBook.java 📎 frmHome.java 📎 frmLogin.java 📎 frmRate.java 📎 frmReccomend.java 📎 Books.java 📎 Member.java 📎 Main.java

paper bobcatBOT Jan 20, 2024, 10:32 PM

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pine tide

I uploaded your attachments as Gist.

finite spindle Jan 20, 2024, 10:32 PM

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you would call Books.java -> Book.java instead

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because an instance represents one book

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what is the prefix frm?

pine tide Jan 20, 2024, 10:33 PM

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frame i think

finite spindle Jan 20, 2024, 10:33 PM

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like frmBook.java

pine tide Jan 20, 2024, 10:33 PM

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frame

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its for my guis

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all frms are guis

finite spindle Jan 20, 2024, 10:33 PM

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call it differently

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like BookView or smth

pine tide Jan 20, 2024, 10:33 PM

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Ok

finite spindle Jan 20, 2024, 10:34 PM

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also these are way to many comments:

  //Declaration of all widgets goes here
  //declaring the title lable
  JLabel lblTitle;
  //declaring the name label
  JLabel lblISBN;
  //declaring the password label
  JLabel lblBookTitle;
  //declaring the password label
  JLabel lblYear;
  //declaring the password label
  JLabel lblAuthor;
  //declaring text field
  JTextField txtISBN;
  //declaring text field
  JTextField txtBookTitle;
  //declaring text field
  JTextField txtYear;
  //declaring text field
  JTextField txtAuthor;

pine tide Jan 20, 2024, 10:35 PM

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oh yea i know i just copypasted some and was going to clean most of it up later

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but my teacher does insist to comment every line

finite spindle Jan 20, 2024, 10:36 PM

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pine tide but my teacher does insist to comment every line

this is the dumbest thing I heard in a long while ngl pepe_sad

pine tide Jan 20, 2024, 10:36 PM

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for the marks pepe_sad

finite spindle Jan 20, 2024, 10:37 PM

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ok lets start in the Main.java

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  public static void main(String[] args) {
    Map<String, Integer> myMap = new HashMap<String, Integer>();
    frmLogin myFrame = new frmLogin();
    //we also going to say close the frame when the X button ism pressed
    myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    myFrame.setSize(500,500);//set the frame size
    myFrame.setVisible((true));
    //load books
    loadBooks("books.txt");
    //load ratings
    loadRatings("ratings.txt");  

    
    //create usernames and passwords for the existing users
    // for(int i = 0; i <= strListRatings.size()-1; i += 2){
    //   addUser(strListRatings.get(i),strListRatings.get(i));
    // }

  }

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what is myMap I think its not used

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remove it in that case

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frmLogin should be called LoginView or smth

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the variable shouldnt be called myFrame

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instead call it like login or smth which represents this variable

pine tide Jan 20, 2024, 10:39 PM

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oh yea mymap was a thing my teacher was trying to teach

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but i didnt really know how to use it so yea i did not use it..

finite spindle Jan 20, 2024, 10:39 PM

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myFrame.setVisible((true));

what is the use of the extra parenthesis? remove them

pine tide Jan 20, 2024, 10:40 PM

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finite spindle ```java myFrame.setVisible((true)); ``` what is the use of the extra parenthesis...

copypaste from his code i dont know pepe_sad

finite spindle Jan 20, 2024, 10:40 PM

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you have a lot of methods like addBook, addRating , getUserRatings, addUser which are all static and inside Main.java

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they shouldnt be there

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there should get their own class

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and all should be non static

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create a class like Library.java or smth

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also what does strListRatings store?

pine tide Jan 20, 2024, 10:42 PM

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loadRatings

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uses it

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to store ratings

finite spindle Jan 20, 2024, 10:42 PM

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ratings of what?

pine tide Jan 20, 2024, 10:42 PM

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then strListRatings is used in the other methods

finite spindle Jan 20, 2024, 10:42 PM

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ratings of a book?

pine tide Jan 20, 2024, 10:42 PM

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yea

finite spindle Jan 20, 2024, 10:43 PM

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then store them in the related Book instance

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as well as

public static ArrayList<String> strListBooks = new ArrayList<String>();

what does this store?

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the names of the books?

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the whole information of a book?

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why not having a List<Book> instead?

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also the class Main should be public

pine tide Jan 20, 2024, 10:45 PM

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finite spindle as well as ```java public static ArrayList<String> strListBooks = new ArrayList...

reads the books from the file

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and keeps a list of the author,bookname

pine tide Jan 20, 2024, 10:46 PM

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finite spindle why not having a `List<Book>` instead?

Umm idk this was just easier to do naturally

finite spindle Jan 20, 2024, 10:46 PM

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how that?

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what is the use of Books.java then?

pine tide Jan 20, 2024, 10:48 PM

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i use it in addBook

finite spindle Jan 20, 2024, 10:49 PM

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this is bad design

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create a dedicated class for managing your books

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like Library or anything

pine tide Jan 20, 2024, 10:51 PM

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Oh ok

finite spindle Jan 20, 2024, 10:52 PM

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it will improve your projects structure by a lot

pine tide Jan 20, 2024, 10:55 PM

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Okay

#Java gui question