Chris Whitcomb

Thank you! Your suggestion worked. Now that you point it out it makes total sense to me. Thank you for helping me on my journey of learning!

I have a relatively simple program where I'm trying to display values from a 2 column mySql table into a TableView in Java. My program is getting choked up with an error that says "java: incompatible types: java.lang.String cannot be converted to int."

My setup is as follows:

I've created a separate Java class that creates an object with 2 variables (brandId and brandName) called "Brand"

public class Brand {    private String brandId;    private String brandName;    public Brand(String brandId, String brandName) {        this.brandId = brandId;        this.brandName = brandName;    }    public String getBrandId() {        return brandId;    }    public String getBrandName() {        return brandName;    }    public void setBrandId(String brandId) {        this.brandId = brandId;    }    public void setBrandName(String brandName) {        this.brandName = brandName;    } }

I have another Java class called "DatabaseHandler" that has all the code that interacts with the mySql database. In that code I have the following method that is supposed to connect to mySql database table called "dim_brand," retrieve all values, and populate them in an ObservableList  that I will use to populate the TableView.

       public ObservableList<Brand> getBrandDimension() {            Connection conn = getDbConnection();            ObservableList<Brand> list = FXCollections.observableArrayList();            try {                PreparedStatement ps = conn.prepareStatement("SELECT * FROM dim_brand");                ResultSet rs = ps.executeQuery();                while (rs.next()) {                    System.out.println("Brand ID: " + rs.getString("brand_id")                            + "   Brand Name: " + rs.getString("brand_name"));                    list.add(rs.getString("brand_id"), rs.getString("brand_name"));                }            } catch (Exception e) {                e.printStackTrace();            }            return list;        }    }

In testing and debugging the code, I've gotten the connection to the database to succeed and I've be able out sout the results. My program is choking on the statement:

list.add(rs.getString("brand_id"), rs.getString("brand_name"));

I have no idea why since I'm able to use the getString() method in the sout statement without any issue. I'm thinking it has something to do with the ObservableList<Brand> that I'm trying to insert the values into. Any help our insight would be greatly appreciated.

View of mySql table dim_brand:

brand_id: VARCHAR10
brand_name: VARCHAR45

brand_id	brand_name
JONMURPHY	Johnston & Murphy
JOSABANK	Jos A Bank
NIKE	Nike
TOMJAMES	Tom James

I'm fairly new to JavaFX using Scenebuilder and FXML and am looking for some help. I have a GUI that I've built in SceneBuilder and a large part of that GUI is the right hand side which contains a TabPane. The TabPane has Tabs that  each represent a type of article of clothing. I have set up buttons on the left that, when clicked, will change the view on the Tab. By default, the content on the Tab will display a bunch of information about each article of clothing. I have a button on the left label "Pictures Only." When this button is pressed, I want the AnchorPane in the Tab of the TabPane to be replaced by a different Pane which will include only pictures of the different articles of clothing. I have defined the replacement Pane (VBox in this case) in the <fx:define> context. The application runs but when I click on the "Pictures Only" button, nothing happens. What am I doing wrong?

GUI: see attachment

From FXML.Document.fxml: - Content for Tab labeled "Belt"

  <TabPane prefHeight="840.0"> <tabs> <Tab id="tbBelt" closable="false" text="Belt"> <content> <AnchorPane fx:id="apBeltFullDesc"  styleClass="tab"> <children> <Label layoutX="46.0" layoutY="50.0" text="ID" /> <Label layoutX="46.0" layoutY="90.0" text="Age" /> ... <TextField layoutX="186.0" layoutY="445.0" /> <TextField layoutX="186.0" layoutY="485.0" /> </children> </AnchorPane> <fx:define> <VBox fx:id="testing"> <children>                             <Label layoutX="46.0" layoutY="50.0" text="ID" /> </children> </VBox> </fx:define> </content> </Tab>

FXMLDocumentController.java:

public class FXMLDocumentController implements Initializable {     /* The AnchorPane for the entire application */ @FXML private AnchorPane apRoot; /* Button to click that will change view to pictures images only */ @FXML private RadioButton btnPicturesOnly;     /* Tabs within Tab Pane that list all the different types of clothing */ @FXML private Tab tbBelt;     @FXML private VBox testing;     @FXML private void swapImagePane(ActionEvent event) {  tbBelt.setContent(testing); }         @Override public void initialize(URL url, ResourceBundle rb) {        // TODO    }         }

As you suggested I put PicView in front of pictureNamesArrayList and it can see it now. Thank you!

I have 2 classes; one called PicView and another one called PicDisplay. In PicView I declare:

static ArrayList<File> pictureNamesArrayList;

I later fill this array with all the JPG's in a particular directory.

In the PicDisplay class, I have a few methods that manipulate the picture. Without getting into a great deal of detail, I need for a method in PicDisplay to be able to "see" the pictureNamesArrayList variable but even when I list it as static, I'm getting the following error: "cannot find symbol, variable pictureNamesArrayList."

Below is the method where I'm trying to access the pictureNamesArrayList within the PicDisplay class (of which I've created an instance of):

           public void findImageIndexValue( Icon currentPic ) {        // Have to cast the Icon in the Label to an ImageIcon so I can use the getDescription()        // method of class ImageIcon which, in this case, houses the image name ImageIcon imageFilename = (ImageIcon) currentPic; //For loop to iterate through each element in ArrayList and when correct slot is found put # into variable for use later for ( int i=0; i < pictureNamesArrayList.size(); i++ ) {  if ( imageFilename.getDescription().equals( pictureNamesArrayList.get(i).getName() )) {            currPictureIndex = i;  break;          } }

Thank you so much! I would have never figured that out on my own.

I'm new at using NetBeans and I have a class that creates a JButton. I want to display a small image in the JButton but no matter where I put the image, I can't get NetBeans to recognize that it's there. I've searched on the internet but all the answers I see use the JForm part of NetBeans to attach an image and don't use just straight coding. I know the program works because I originally wrote it in a text editor and it displayed the image. Any help would be appreciated.

You can see below where I create the JButton and where the images currently are. Also included is a screenshot of what the program looks like when I compile and run using NetBeans

Thank you. That worked! I am adding a few more things to the JPanel and have some functions that I also have to add but wanted to keep the code here simple so people didn't have to wade through a ton of it. I haven't had much experience with layout managers yet but that's next on the list to conquer. Thanks again!

That makes sense to me. Thanks for explaining. I'm not getting an error anymore but I'm also not seeing the JLabel. Here is my program that contains the main() method and calls the PicDisplay object:

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class PicView extends JFrame {    public PicView() {        createUserInterface();        setTitle( "Picture viewing and sorting application" ); setSize( 2200, 1000 ); setVisible(true);    }        public void createUserInterface() {                Container contentPane = getContentPane();        contentPane.setLayout( null );            PicDisplay onePic = new PicDisplay();        contentPane.add( onePic );    }        public static void main(String[] args) {        PicView application = new PicView(); application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );    } }

And here is the code for PicDisplay:
import java.awt.*; import java.awt.event.*; import javax.swing.*; /** * * @author Chris Whitcomb */ public class PicDisplay extends JPanel {        // Holds text for 'archive or trash' action    private JLabel archiveOrTrashText;        // Font for labels    Font labelFont = new Font("Courier", Font.PLAIN, 18);        // no arguement constructor    public PicDisplay () {       setSize( 450, 650);       setBorder( BorderFactory.createEtchedBorder() );       setVisible( true );       setLayout( null );            }        private void createArchiveOrTrashText () {        archiveOrTrashText = new JLabel( "Archive or move to trash: ");        archiveOrTrashText.setFont( labelFont );        archiveOrTrashText.setBounds( 10, 10, 300, 30 );        archiveOrTrashText.setVisible( true );        add(archiveOrTrashText);    }     }

I've attached an image of the result I get when I run the code.

Any help would be appreciated and thank you for the help so far.

Yes. I do want to attach a label to the Container (JPanel). I'm not sure I understand your response. I apologize, I'm very much a beginner. I tried to add a line like (at 32) PicDisplay.add(archiveOrTrashText); but I'm getting an error.

I have written a basic Java program that has a number of different Swing components on a single JFrame. One of those components is a JPanel that has some buttons and a JLabel on it. The program will get pictures from a directory and display them in the just mentioned JLabel. I have 4 instances of JPanel's attached to my JFrame. (Attached screenshot below bc "a picture is worth 1000 words")

At first, I had all this code in 1 large class but, realizing there was a lot of redundancy, decided to make a class called PicDisplay which would extend JPanel and that I could call from my main program. This class would create the JPanel, all the buttons and label, and hold the methods that allow me to manipulate the Icon (in the label). However, when I got to the point where I needed to attach some of the buttons and labels to the JPanel I realized I didn't know how to do this.

import java.awt.*; import java.awt.event.*; import javax.swing.*; /** * * @author Chris Whitcomb */ public class PicDisplay extends JPanel {        // Holds text for 'archive or trash' action    private JLabel archiveOrTrashText;    // I've 6 or 7 other components to add but kept it brief for this post    // JLabel that holds actual image    private JLabel picture;        // Font for labels    Font labelFont = new Font("Courier", Font.PLAIN, 18);        // no arguement constructor    public PicDisplay () {       setSize( 450, 650);       setBorder( BorderFactory.createEtchedBorder() );       setVisible( true );       setLayout( null );            }        private void createArchiveOrTrashText () {        archiveOrTrashText = new JLabel( "Archive or move to trash: ");        archiveOrTrashText.setFont( labelFont );        archiveOrTrashText.setBounds( 10, 10, 300, 30 );          // How do I add this JLabel to the PicDisplay which extends JPanel and I will call from the main frame with something like PicDisplay picOneJPanel = new PicDisplay();    }     }

Piet Souris - THANK YOU!! Thank for you not believing me because you were right. I took off the ArrayList<File> and it worked. Very much appreciate it!

Piet - I checked the mistake in the topic you listed (that was my post as well) and this one is a little different although it's the same program. You were right that I had declared pictureNamesArrayList twice in the previous post and once I took care of that I didn't have that problem anymore. I'm going to give what you listed below in Java 8 a try.

Campbell - this shows that my pictureNamesArrayList is not null I believe
// load all pictures in directory choosen into an ArrayList  ArrayList<File> pictureNamesArrayList = new ArrayList<File>(Arrays.asList( picturesDirectory.listFiles()) );    JOptionPane.showMessageDialog( this, pictureNamesArrayList.size(), "", JOptionPane.INFORMATION_MESSAGE );

Carey - here is the code I use to set the initial images
// to load the names of the pictures in the target directory chosen into an ArrayList and // load picture panels with pictures public void loadPictures( ActionEvent event ) { // load all files from directory in target JText field if ( !sourceJTextField.getText().trim().equals("") ) {  File picturesDirectory = new File( sourceJTextField.getText() );  // load all pictures in directory choosen into an ArrayList  ArrayList<File> pictureNamesArrayList = new ArrayList<File>(Arrays.asList( picturesDirectory.listFiles()) );    JOptionPane.showMessageDialog( this, pictureNamesArrayList.size(), "", JOptionPane.INFORMATION_MESSAGE );    // Iterate through Array List and populate the images into the labels  for (int i=0; i < pictureNamesArrayList.size(); i++ ) {  switch ( i ) {  case 0: picOneLabel.setIcon( ResizeImage( pictureNamesArrayList.get(i), picOneLabel.getWidth(), 0)); break;  case 1: picTwoLabel.setIcon( ResizeImage( pictureNamesArrayList.get(i), picTwoLabel.getWidth(), 0)); break;  default: JOptionPane.showMessageDialog( this, "Error", "Error", JOptionPane.ERROR_MESSAGE);    }  // end switch statement    }   // end for statement   } else { JOptionPane.showMessageDialog( this, "You need to choose a directory first", "Error", JOptionPane.ERROR_MESSAGE ); } }

All,

My understanding of inner anonymous classes is very limited so I need some help. I'm getting a NullExceptionPointer java error and I think I've isolated it to one particular line. However, despite all my searching on the internet I can't find an answer. From a 10,000 foot level, I have a program that creates a JFrame and has panels which contain some buttons and also a JLabel that displays an ImageIcon. I get the ImageIcon by letting the user read choose a directory to read and then reading that directory and loading all images from that directory into an ArrayList<File> variable.  I have a button that you can press that calls a method which is supposed to call a method that will accept a few parameters and use them to resize the image and rotate it a certain number of degrees. I've attached an image to help with the visual of the JFrame.

Here is the code:
public class PicView extends JFrame {

Within that class I set up:
private JPanel oneJPanel;         // Panel that will display the picture private JButton one90JButton;  // Button that, when clicked, will rotate image 90 degrees private ArrayList<File> pictureNamesArrayList;  // Array list that will hold the names of the pictures to be sorted through // This is my constructor public PicView () { createUserInterface(); setTitle( "Picture viewing and sorting application" ); setSize( 2200, 1000 ); setVisible(true); } // create and position GUI components; register event handlers public void createUserInterface() { // get content pane for attaching GUI components Container contentPane = getContentPane(); // enable explicit position of GUI Components contentPane.setLayout( null );

I then have code that sets up all the menus and panels and such that I don't think is really pertinent to my question.

Here is my code that is still within the createUserInterface method and that creates the button you can click to resize the image and rotate it 90 degrees:

// Button to rotate image 90 degrees one90JButton = new JButton ( "90" ); one90JButton.setBounds ( 260, 60, 40, 40 ); one90JButton.setFont( buttonFont ); one90JButton.setVisible( true ); one90JButton.setBorder( BorderFactory.createRaisedSoftBevelBorder() ); oneJPanel.add( one90JButton ); one90JButton.addActionListener( new ActionListener() { public void actionPerformed ( ActionEvent event ) {  one90JButtonActionPerformed( event ); } } );

My createUserInterface method ends after creating all the other GUI components

I then have a method that populates pictureNamesArrayList and I know that works because it does display the images in the JLabels before any buttons are pressed.

Here is my problem code. This method is supposed to call the ResizeImage method I've created.
public void one90JButtonActionPerformed( ActionEvent event ) { // Call Resize function (which resizes and rotates) //JOptionPane.showMessageDialog( this, pictureNamesArrayList.size() , "", JOptionPane.INFORMATION_MESSAGE ); picOneLabel.setIcon( ResizeImage( pictureNamesArrayList.get(0), picOneLabel.getWidth(), 90 )); }

As I was trying to pinpoint my error, I inserted the JOptionPane.showMessageDialog statement you see above and I still get the Null exception pointer error. However, if I change the second argument statement  from pictureNamesArrayList.size() to "Testing" then I do get a pop-up box with the text "Testing." So, I think that one90JButtonActionPerformed method is not "seeing" the pictureNamesArrayList. How do I solve for this?

I did and I do see a getIcon() method for JLabel. The problem is that I can't get the Image out of the Icon so to speak because the Icon interface only has 3 methods: getIconHeight, getIconWidth, and paintIcon.