Code is pretty simple. I get a URL string from an arraylist. I am then trying to draw an image in my JPanel. If I don't initialize a layout in the code, it returns an error. If I do initialize a layout, there's no error, but the icon doesn't display either. Am I missing something? Thank you!
public class CharacterPage extends JFrame {
private JPanel imagesPanel;
private WikiDB wikiDB;
public CharacterPage(WikiDB db) throws IOException {
super("Character Page");
setContentPane(rootPanel);
pack();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setVisible(true);
setSize(new Dimension(500,500));
imagesPanel.setLayout(new BorderLayout());
this.wikiDB = db;
searchButton.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
ArrayList<String> characterImages =
wikiDB.searchImages(characterID);
//array contains this string: http://cosplayidol.otakuhouse.com/wp-content/uploads/2012/06/s-1-1.jpg
for (int x = 0; x < characterImages.size(); x++){
String imageURL = characterImages.get(x);
Graphics g = getGraphics();
try {
URL url = new URL(imageURL);
//icon.paintIcon(imagesPanel,g,300,100);
JLabel wIcon = new JLabel(new ImageIcon(url));
imagesPanel.setVisible(true);
imagesPanel.add(wIcon);
} catch (MalformedURLException mue){
mue.printStackTrace();
}
}
});
}
Below is a separate program I used to read my URL. Using the code below, I can read my URL without returning any errors, but it still doesn't display in the GUI.
public class SimpleGUI extends JFrame {
private JPanel imagesPanel;
public SimpleGUI() throws IOException {
super("GUI Page");
setContentPane(imagesPanel);
pack();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setVisible(true);
setSize(new Dimension(500, 500));
imagesPanel.setLayout(new GridLayout());
BufferedImage img1 = null;
try
{
URL url1 = new URL("http://cosplayidol.otakuhouse.com/wp-content/uploads/2012/06/s-1-1.jpg");
URLConnection conn1 = url1.openConnection();
conn1.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11");
InputStream in1 = conn1.getInputStream();
img1 = ImageIO.read(in1);
} catch (IOException e)
{
e.printStackTrace();
}
JLabel wIcon = new JLabel(new ImageIcon(img1));
imagesPanel.add(wIcon);
}
}
EDIT: I am getting closer in that I can now pop up a separate frame containing the picture using this code:
public class SimpleGUI extends JFrame {
private JPanel imagesPanel;
private JFrame mainFrame;
public SimpleGUI() throws IOException {
super("GUI Page");
setContentPane(imagesPanel);
pack();
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setSize(new Dimension(500, 500));
mainFrame = new JFrame();
imagesPanel.setLayout(new GridLayout());
imagesPanel.setBounds(0,0,200,200);
mainFrame.add(imagesPanel);
mainFrame.setVisible(true);
I can't seem to find the original frame in my GUI form, so I can add the imagesPanel to that instead. I am using IntelliJ's GUI form builder.
One problem, you're trying to add multiple components to a BorderLayout using JPanel from within a for loop and by doing this, you'll over-write all that was added before with anything added new. Use a much more appropriate layout such as a GridLayout instead.
Another problem, where do you add the imagesPanel to anything? Calling setVisible(true) on it will do nothing of use, but adding it to the JFrame or to a JPanel that is ultimately held by the JFrame will do a lot.
Also, you need to do some serious debugging usually before coming here -- does your reading in of the image work at all? Create a simple GUI, one that reads in the Image (use ImageIO.read(URL url) for this), creates an ImageIcon and displays the Icon in a JOptionPane. If this works, then the problem is elsewhere. If it doesn't then work on correcting the URL address.
Related
I am creating a log in application for someones graduation, I need several text fields and a background, I have added the background and now need to add the text fields, the problem is that they won't seem to go on top of each other.
I have tried them each separately and without one another they both work perfectly but i can't get them to stack, I have seen several answers on this site to deal with a similar problem but for this application I need to put several text fields on the background as apposed to just one, here is what I have thus far...
//creates the frame with a title as a parameter
JFrame frame = new JFrame("Sign In Sheet");
//sets the size
frame.setSize(1000, 556);
//makes it so the application stops running when you close it
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//puts it in the center of the screen
frame.setLocationRelativeTo(null);
//makes it so you can't resize it
frame.setResizable(false);
//setting the background by looking for the image
try{
frame.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("C:/Users/Gabriel R. Warner/Desktop/clouds.png")))));
}catch(IOException e){
//and prints an error message if it's not found
System.out.println("well it didn't work");
}
//adding text fields with names apropriate to function
JTextField name1 = new JTextField();
name1.setPreferredSize(new Dimension(200, 15));
name1.setBackground(Color.WHITE);
frame.add(name1);
//makes frame visible
frame.setVisible(true);
Simply stated the text field won't show up with the background and all the results only offer answers for a single text field
The problem is in this line: frame.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("C:/Users/Gabriel R. Warner/Desktop/clouds.png")))));
In this line you set a JLabel as the content pane of your JFrame. Then, you frame.add(name1); So you are adding a JTextField to a JLabel...Well this does not seem right, right?
The answer would be to create a new JPanel, add the background image to this panel, set the panel as the content pane of the frame and finally add the textfield to the panel/contentpane.
An example:
#SuppressWarnings("serial")
public class FrameWithBackgroundImage extends JFrame {
public FrameWithBackgroundImage() {
super("Sign In Sheet");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
try {
Image bgImage = loadBackgroundImage();
JPanel backgroundImagePanel = new JPanel() {
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(bgImage, 0, 0, null);
}
};
setContentPane(backgroundImagePanel);
} catch (IOException e) {
e.printStackTrace();
}
JTextField textField = new JTextField(10);
add(textField);
}
private Image loadBackgroundImage() throws IOException {
File desktop = new File(System.getProperty("user.home"), "Desktop");
File image = new File(desktop, "img.jpg");
return ImageIO.read(image);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
new FrameWithBackgroundImage().setVisible(true);
});
}
}
Preview:
Worth to read question: Simplest way to set image as JPanel background
I'm trying to add the image "Pic.png" to this JLabel "label1" and display it on the JPanel "panel1" on a JFrame "window1". But it when I hit run it doesn't display my image. Anyone help? (I read about adding it to the source file or something but I'm not really sure what I'm doing because I'm new to Java. Will it not be able to access the picture without the image being in the source?)
public class UIForIshidaQuery {
public static void main(String[] args) {
System.out.println("Running...");
JFrame window1 = new JFrame();
window1.setVisible(true);
window1.setSize(1080, 720);
window1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel1 = (JPanel) window1.getContentPane();
JLabel label1 = new JLabel();
panel1.setLayout(null);
ImageIcon image = new ImageIcon("C:\\Users\\BC03\\Pictures\\Saved Pictures\\Other\\Pic.png");
label1.setIcon(image);
label1.setBounds(500, 500, 500, 500);
panel1.add(label1);
}
}
The window should be set visible as the last call. Don't use null layouts1. This works.
import java.net.*;
import javax.swing.*;
public class UIForIshidaQuery {
public static String url = "http://i.stack.imgur.com/gJmeJ.png";
public static void main(String[] args) throws MalformedURLException {
System.out.println("Running...");
JFrame window1 = new JFrame();
window1.setSize(1080, 720);
window1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel1 = (JPanel) window1.getContentPane();
JLabel label1 = new JLabel();
//panel1.setLayout(null);
ImageIcon image = new ImageIcon(new URL(url));
label1.setIcon(image);
//label1.setBounds(500, 500, 500, 500);
panel1.add(label1);
window1.setVisible(true);
}
}
Java GUIs have to work on different OS', screen size, screen resolution etc. using different PLAFs in different locales. As such, they are not conducive to pixel perfect layout. Instead use layout managers, or combinations of them along with layout padding and borders for white space.
If you are using IntelliJ IDEA:
Right click your project root directory and select New > Directory;
Call the new directory 'resources' for example;
Right click the newly made directory and select Mark Directory As > Resources Root;
Add your image file in the directory;
Access your file properly:
CurrentClass.class.getClassLoader().getResource("pic.png").getFile();
The ImageIcon could be initialized like this:
File file = new File(CurrentClass.class.getClassLoader().getResource("pic.png").getFile());
BufferedImage image = null;
try {
image = ImageIO.read(file);
} catch (IOException e) {
e.printStackTrace();
}
ImageIcon imageIcon = new ImageIcon(image);
So I'm going into GUI's in Java, and am trying to create a simple main menu for a timer. All is well until I've attempted to add a background for the GUI. Adding the background works, however all other components are now gone, (the button). How could I fix this?
EDIT: Here is my new code.
public class MainMenu {
// JFrame = the actual menu / frame.
private JFrame frame;
// JLabel = provides text instructions or information on a GUI —
// display a single line of read-only text, an image or both text and an image.
private JLabel background;
// JButton = button.
private JButton alarmClockButton;
// Constructor to create menu
public MainMenu() {
frame = new JFrame("Alarm Clock");
alarmClockButton = new JButton("Timer");
// Add an event to clicking the button.
alarmClockButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// TODO: CHANGE TO SOMETHING NICER
JOptionPane.showMessageDialog(null, "This feature hasn't been implemented yet.", "We're sorry!",
JOptionPane.ERROR_MESSAGE);
}
});
// Creating the background
try {
background = new JLabel(new ImageIcon(ImageIO.read(getClass()
.getResourceAsStream("/me/devy/alarm/clock/resources/Background.jpg"))));
} catch (IOException e) {
e.printStackTrace();
}
frame.setLayout(new FlowLayout());
frame.setContentPane(background);
frame.add(alarmClockButton);
frame.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
frame.setVisible(true);
frame.setSize(450, 400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
alarmClockButton.setForeground(Color.RED);
}
}
Thank you!
frame.setContentPane(background);
You use the label as the content pane. The problem is that the label doesn't use a layout manager by default.
You need to add:
background.setLayout( new BorderLayout() ); // or whatever layout you want
frame.setContentPane(background);
Now you can add the button directly to the frame. You don't need the panel.
Or if you want to get fancy you can use the Background Panel which gives you the option to scale or tile the background image.
Instead of making the ContentPane as JLabel, you can wrap the JLabel in a JPanel, then add this JPanel as the ContentPane :
public class MainMenu {
public static void main(String[] args) {
new MainMenu();
}
// JFrame = the actual menu / frame.
private JFrame frame;
private JPanel panel;
private JPanel bkgPanel;
// JLabel = provides text instructions or information on a GUI —
// display a single line of read-only text, an image or both text and an
// image.
private JLabel background;
// JButton = button.
private JButton alarmClockButton;
// Constructor to create menu
public MainMenu() {
frame = new JFrame("Alarm Clock");
panel = new JPanel();
bkgPanel = new JPanel();
alarmClockButton = new JButton("Timer");
// Add an event to clicking the button.
alarmClockButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
// TODO: CHANGE TO SOMETHING NICER
JOptionPane.showMessageDialog(null, "This feature hasn't been implemented yet.", "We're sorry!",
JOptionPane.ERROR_MESSAGE);
}
});
// Creating the background
try {
background = new JLabel(new ImageIcon(
ImageIO.read(getClass().getResourceAsStream("/me/devy/alarm/clock/resources/Background.jpg"))));
bkgPanel.add(background);
} catch (IOException e) {
e.printStackTrace();
}
frame.setContentPane(bkgPanel);
frame.add(panel);
panel.add(alarmClockButton);
frame.setVisible(true);
frame.setSize(450, 400);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
alarmClockButton.setForeground(Color.RED);
}
}
I'm new to Java GUI, and am having issues displaying an image. My intention is to display a large image and allow the user to click on regions of the image to indicate where certain features are located. Anyway, I'm getting a rough start because I can't even get the image to appear, despite reading Oracle's explanation and other solutions.
I've created a JFrame and used its setContentPane() method to add a JPanel and JLabel. I use the setIcon() method of the JLabel to add an image to it, or at least that's my intention...
Any advice is appreciated, especially if there's a better way of doing this. I'll be using OpenCV to process images, and plan to convert them to Java image (or BufferedImage) before displaying them.
Here is the code. I left out the libraries to save space.
public class Pathology {
public static void main(String[] args) {
PrimaryFrame primaryFrame = new PrimaryFrame();
primaryFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);
primaryFrame.setSize(1500, 900);
primaryFrame.setVisible( true );
primaryFrame.setContentPane(primaryFrame.getGui());
try {
primaryFrame.setImage(ImageIO.read(new File("C:\\Users\\Benjamin\\Pictures\\Pathology\\C\\001.png")));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
GUI Class:
public class PrimaryFrame extends JFrame{
//private JTextField textField1;
JPanel gui;
JLabel imageCanvas;
public PrimaryFrame() {
super( "Pathology-1" );
//setLayout(new FlowLayout());
//textField1 = new JTextField("Chup!", 50);
//add(textField1);
}
public void setImage(Image image) {
imageCanvas.setIcon(new ImageIcon(image));
}
public void initComponents() {
if (gui==null) {
gui = new JPanel(new BorderLayout());
gui.setBorder(new EmptyBorder(5,5,5,5));
imageCanvas = new JLabel();
JPanel imageCenter = new JPanel(new GridBagLayout());
imageCenter.add(imageCanvas);
JScrollPane imageScroll = new JScrollPane(imageCenter);
imageScroll.setPreferredSize(new Dimension(300,100));
gui.add(imageScroll, BorderLayout.CENTER);
}
}
public Container getGui() {
initComponents();
return gui;
}
}
Would you laugh at me if I'd tell you that you just have to put the primaryFrame.setVisible( true ); to the end of the main method? :)
For furture understanding, you don't have to call frame.setVisible(true) every time you want to add/update something in the frame (in an ActionListener, for example). Instead you can call frame.revalidate() and frame.repaint(). (Where frame can be replaced with the particular panel)
You need to setVisible(true) after the call to setImage():
primaryFrame.setImage(ImageIO.read(new
File("C:\\Users\\Benjamin\\Pictures\\Pathology\\C\\001.png")));
because any update to the GUI after setVisible() will not be shown.
That's it and the code should be like this:
public class Pathology {
public static void main(String[] args) {
PrimaryFrame primaryFrame = new PrimaryFrame();
primaryFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);
primaryFrame.setSize(1500, 900);
primaryFrame.setContentPane(primaryFrame.getGui());
try {
primaryFrame.setImage(ImageIO.read(new File(
"C:\\Users\\Benjamin\\Pictures\\Pathology\\C\\001.png")));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
primaryFrame.setVisible( true );
}
}
I've already tried loads of code from Stack. For some reason it's just not setting the ImageIcon for my JFrame, the comments are other attempts that have not worked;I avoided calling super so that I could reference the JFrame -- GUIPhotoAlbum extends JFrame; code:
public GUIPhotoAlbum ()
{
super("PhotoAlbum");
ImageIcon img = new ImageIcon("Photos/albumIcon.png");
this.setIconImage(img.getImage());
/*
try{
setIconImage(ImageIO.read(new File("Photos/albumIcon.png")));
}catch(Exception e){
System.out.print("Didn't work.");
}
*/
setSize(875, 625);
this.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
this.setLayout(new BorderLayout(5, 5));
initComponents();
initMenuBar();
initTopPanel();
add(topPanel, BorderLayout.CENTER);
initBottomPanel();
add(bottomPanel, BorderLayout.SOUTH);
addListeners();
setLocationRelativeTo(null);
setVisible(true);
}
EDIT
I'm running the program like this, where I try to set the ImageIcon of JFrame in the GUIPhotoAlbum() constructor; here's the driver:
public class AlbumDriver
{
public static void main (String [ ] args)
{
SwingUtilities.invokeLater
(
new Runnable()
{
#Override
public void run()
{
GUIPhotoAlbum pa = new GUIPhotoAlbum();
}
}
);
}
}
What am I doing wrong here?
PS I've tried BufferedImage, ImageIcon, using File.. and I'm using a Mac
Mac does not support frame icons, as seen in this answer.
Use this to change Dock Image in mac:
File imageFile = new File("Your image Path");
Image image = ImageIO.read(imageFile);
Application.getApplication().setDockIconImage(image);
For windows use this:
YourFrameObject.setIconImage(image);
The problem is, you class appears to be extending from JFrame but you're creating a new instance of a JFrame and setting it's icon instead...
JFrame newFrame = new JFrame("PhotoAlbum");
ImageIcon img = new ImageIcon("Photos/albumIcon.png");
newFrame.setIconImage(img.getImage());
Don't create the second instance of the JFrame, there's no need for newFrame in this instance...
For example...
public GUIPhotoAlbum ()
{
super("PhotoAlbum");
ImageIcon img = new ImageIcon("Photos/albumIcon.png");
setIconImage(img.getImage());
/*
//when uncommented, exception is never thrown
try{
setIconImage(ImageIO.read(new File("Photos/albumIcon.png")));
}catch(Exception e){
System.out.print("Didn't work.");
}
*/
// Hint use pack instead, but only after
// You've finished adding the components to the frame
setSize(875, 625);
setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout(5, 5));
initComponents();
initMenuBar();
initTopPanel();
add(topPanel, BorderLayout.CENTER);
initBottomPanel();
add(bottomPanel, BorderLayout.SOUTH);
addListeners();
setLocationRelativeTo(null);
setVisible(true);
}