I tried to add an jpg image file into my Java Swing page,
but when running, system always back error "Source not found" and stucking there.
the source code are following
this.setLayout( new BorderLayout( ) );
URL url = getClass().getResource("logo");
ImageIcon imageicon = new ImageIcon( url );
JLabel label = new JLabel( imageicon );
this.add( label, BorderLayout.NORTH );
The file name is: "unStudent.java", and image file is "logo". I have put the both files in the same folder, why system can not find image file? what should I change?
Thanks in advance.
Tony
Try this method to create your ImageIcon. Make it public or private, it's up to your design.
private ImageIcon createIcon(String path)
{
URL url = getClass().getResource(path);
if(url == null)
{
System.err.println("Could not load the icon: " + path);
}
ImageIcon icon = new ImageIcon(url);
return icon;
}
now make sure that path is the correct path to the file and with the file extension.
I'm quite sure your mistake, or one of your mistakes, is the file extension missing. So if your logo file is a png image type and it is stored in c:\images your path must be c:\images\logo.png
I would recommend you to place your images inside your project folder.
PS; pay attention to \ escaping. I assume you know it.
Try this soluion:
URL url = getClass().getResource("logo.jpg");
if it does not works try to put the absolute path of your image as follows:
URL url = new URL("C://folder/logo.jpg");
Related
All I am trying to do is create a JLabel using an image located in the same directory as the .jar and if it does not exist it will load a default photo located inside the .jar iteself. The picture exists in the folder however it always defaults to the picture inside the .jar
String path = this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
File logo = new File(path + "logo.png");
JLabel lblNewLabel_1;
if (logo.exists()){
lblNewLabel_1 = new JLabel(new ImageIcon(logo.getPath()));
} else {
lblNewLabel_1 = new JLabel(new ImageIcon(Main.class.getResource("/com/daniel/Coffee.png")));
}
frame.getContentPane().add(lblNewLabel_1, BorderLayout.WEST);
final JLabel lblStatus = new JLabel(new ImageIcon(Main.class.getResource("/com/daniel/status1.png")));
frame.getContentPane().add(lblStatus, BorderLayout.EAST);
The most simple way to diagnose this issue is to apply simple System.out.println() like here
String path = this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath(;
System.our.println("Jar path is "+path); <- you will see the actual path content here
File logo = new File(path + "logo.png");
Check the result and adjust concatenate path as needed. I guess that path is either pointing to different directory than you think it is, or it is simply missing a File.separator at the end. Try out and share the results!
It looks like you are missing a '/' at the end of path. Do it this way:
String path = this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
File logo = new File(new File(path).getParentFile(), "logo.png");
...
The catch is to first creating a File for the containing directory and then using the constructor File(File dir, String name) instead of string concatenation.
Furthermore, you should check folder and file permissions in advance, providing proper logging output for error diagnosis. For this, use canRead() instead of exists() (assuming log is available as some logging facility - replace with the logging mechanism of your choice):
String path = this.getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
File sourceLocation = new File(path);
// go up in the hierarchy until there is a directory
while (sourceLocation != null && !sourceLocation.isDirectory()) {
sourceLocation = sourceLocation.getParentFile();
if (sourceLocation == null) {
log.warn(path + " is not a directory but has no parent");
}
}
if (sourceLocation != null && sourceLocation.canRead()) {
File logo = new File(sourceLocation, "logo.png");
if (logo.canRead()) {
log.info("Using logo " + logo.getAbsolutePath());
lblNewLabel_1 = new JLabel(new ImageIcon(logo.getPath()));
} else {
log.warn("can not read " + logo.getAbsolutePath());
}
}
if (lblNewLabel_1 == null) {
log.warn("logo location not accessible, using default logo: " + sourceLocation);
lblNewLabel_1 = new JLabel(new ImageIcon(Main.class.getResource("/com/daniel/Coffee.png")));
}
// ...
I want to read Images from resource folder of eclipse without using image name. As of now I am reading it from current directory and taking Absolute Path (photoPath) so that I can reproduce the Image in other panel of a JFrame. However if I make executable jar its start taking images from current directory, my image folder is not coming. Here is my Image choosing code
imageChooser = new JButton("ImageChooser");
panel1.add(imageChooser);
fc = new JFileChooser();
imageLabel = new JLabel();
imageChooser.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
fc.setCurrentDirectory(new File("."));
int result = fc.showOpenDialog(imageChooser);
if (result == JFileChooser.APPROVE_OPTION) {
currentFile = fc.getSelectedFile();
imageLabel.setIcon(new ImageIcon(currentFile.toString()));
panel1.add(imageLabel);
panel1.validate();
photoName=fc.getSelectedFile().getName();
photoPath = currentFile.getAbsolutePath();
}
}
});
Here is my structure
use .getResource()
Example:
new ImageIcon(getClass().getResource("/images/button.png"))
This will work for JAR as well.
I wonder if anyone could help? I have been developing a java app which displays images from disk on a jframe.
Using netbeans I have created a java package called images within my project and stored the images in that package. First off is that the way I should do it If I want them to ship with the app?
I have the following function to read the image:
Image readImg(String file)
{
Image image = null;
try {
File imgFile = new File(file);
image = ImageIO.read(imgFile);
} catch (IOException e) {
// System.out.println("Can not Display Image");
e.printStackTrace();
}
if (image != null){
return image;
} else{
return null;
}
}
My problem comes that I cannot work out the relative filepath to pass to the function. I have got the image to display calling it like so:
Image headerImg = readImg("C:\\Users\\D#nb0y\\Documents\\NetBeansProjects\\GiftAidApp\\src\\images\\galogo.png");
Obviously this will completely fall apart if the app is run on any other device. Can anyone give me a heads up as to making this code portable?
thanks very much
Since it's a JFrame you're trying to add an image to, it might be better to use an ImageIcon instead of an Image.
Try this:
ImageIcon image = new ImageIcon("images/galogo.png");
JLabel imageLabel = new JLabel(image);
frame.add(imageLabel);
This should make the app portable as well if you include you images folder along with your project.
I am trying to display an image in my application...
picture = new JLabel("No file selected");
picture.setFont(picture.getFont().deriveFont(Font.ITALIC));
picture.setHorizontalAlignment(JLabel.CENTER);
scrollPane.setViewportView(picture);
ImageIcon icon = new ImageIcon("map.jpg");
picture.setIcon(icon);
if (picture.getIcon() != null) // to see if the label picture has Icon
picture.setText("HERE IS ICON");
When I run that code, only the "HERE IS ICON" text displayed.
Sorry if this question sounds so dumb, but I really have no clue of why the image icon is not displayed :(
You need to make sure map.jpg exists as a file. If you want to be sure (for testing purposes only), try to use the full path. The way you have it, the path is relative to the application's start directory.
You can double check if it exists with this:
System.out.println(new java.io.File("map.jpg").exists());
You can do that:
ImageIcon icon = createImageIcon("map.jpg", "My ImageIcon");
if (icon != null) {
JLabel picture = new JLabel("HERE IS ICON", icon, JLabel.CENTER);
picture.setFont(picture.getFont().deriveFont(Font.ITALIC));
picture.setHorizontalAlignment(JLabel.CENTER);
scrollPane.setViewportView(picture);
}
The createImageIcon method (used in the preceding snippet) finds the specified file and returns an ImageIcon for that file, or null if that file couldn't be found. Here is a typical implementation:
/** Returns an ImageIcon, or null if the path was invalid. */
protected ImageIcon createImageIcon(String path,
String description) {
java.net.URL imgURL = getClass().getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
The file map.jpg might not be in the same package(folder) as the java file. Check it.
i'm trying to make a small project in java with no luck
if i'm compiling the program with eclipse everything is good, but when i'm i creating the jar file i get a blank window
this is the image i declared for:
public ImageIcon BACKGROUND = new ImageIcon() ;
I have tried to do the following stuff:
1.
new ImageIcon("Images/wood.jpg").getImage());
2.
this.BACKGROUND.setImage(Toolkit.getDefaultToolkit().getImage("Images/wood.jpg"));
3.
this.BACKGROUND = new ImageIcon(getClass().getResource("Images/wood.jpg"));
4.
/** Returns an ImageIcon, or null if the path was invalid. */
protected ImageIcon createImageIcon(String path,
String description) {
java.net.URL imgURL = getClass().getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL, description);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
1 & 2 showing the images after compiling and 3 & 4 returns null
another think is that i'm using mac and when i'm working with windows no image is displayed after compiling.
Here's a small working example if that helps:
public class ImageIconApplet extends JApplet {
public void init() {
URL url = getClass().getResource("/images/WhiteFang34.jpg");
ImageIcon icon = new ImageIcon(url);
JLabel label = new JLabel(icon, JLabel.CENTER);
add(label);
}
}
The jar for the applet on that page contains two files:
/com/whitefang34/ImageIconApplet.class
/images/WhiteFang34.jpg
I'm not sure if you're deploying an applet or a desktop swing app, however the code to load images and the packaging requirements are the same either way.
I have something...
ImageIcon icon = new ImageIcon(getClass().getResource("/package/image.png"));
JFrame.setIconImage(icon.getImage());
Place this inside your constructor.
Are you sure Images/wood.jpg is present in the .jar file?
I suggest you unzip the jar file and make sure that it's there. Otherwise you'll have to revise your build scripts (or what ever technique you use) that builds the jar.
Related questions:
adding non-code resources to jar file using Ant
Add image to JAR Java