Develop Reference

Wrong filepath in java

So we got this assignment in a basic java programming course and we're supposed to implement a kind of card deck. To help us with this they have given us resources that will present a GUI on the screen, but when running my program I get a IOException that says that it can't read the input file, most likely since the pathname is wrong. And I dont know how to fix it, we're not even supposed to be in meddling with this code. The error is thrown in this method:
private Image getImg(Card aCard) {
File pathToFile = null;
if (aCard == null) {
pathToFile = new File("cardset-oxymoron/shade.gif");
} else {
String suits = "cdhs";
char c = suits.charAt(aCard.getSuit());
String fileName = String.format("%s/%02d%c.gif", "cardset-oxymoron", aCard.getRank(), c);
pathToFile = new File(fileName);
}
Image img = null;
try {
img = ImageIO.read(pathToFile);
} catch (IOException ex) {
System.err.println("Failed to create image");
ex.printStackTrace();
}
return img;
}
And according to the error stack(?) it is at line 99, which is the
img = ImageIO.read(pathToFile);
line
The folder that the cards are in is inside the project folder, right in between bin and src. using IntelliJ debugger I can see that the the pathToFile is "cardset-oxymoron\02d.gif". The filename is correct as all the cards are "[01-13][c/d/h/s].gif". When I rightclicked and copied the path to the files inside IntelliJ it was using forwardsslashes and not backslashes. But then I checked in explorer and it was the other way around... I have no idea where this is going wrong, any input would be greatly appreciated!

According to your code your files are in directory cardset-oxymoron relative to your JVM run directory. I'm not sure about IntelliJ (I work all the time with Eclipse and Maven), but it could be bin directory.
You can check it by put those 2 lines to see what is it actually (somewhere before your actual code)
File currentDir = new File("./");
System.out.println(currentDir.getAbsolutePath());
Then your cardset-oxymoron must be in that directory. Or you can change file path appropriately.
E.g. if currentDir is bin then pathToFile will be
pathToFile = new File("../cardset-oxymoron/shade.gif");
as well as fileName for other case.

Loading image from a resource Can't read input file

I am trying to load a resource image, but I am getting an error that says:
javax.imageio.IIOException: Can't read input file!
if(full.equals("")){
try{
full = HomePage.class.getResource("/images/default.jpg").getPath();
System.out.println(full);
File imgPath = new File(full);
BufferedImage bufferedImage = ImageIO.read(imgPath);
WritableRaster raster = bufferedImage.getRaster();
DataBufferByte data = (DataBufferByte)raster.getDataBuffer();
full = "data:image/jpeg;base64," + DatatypeConverter.printBase64Binary(data.getData());
}catch(IOException ex){
Logger.getLogger(HomePage.class.getName()).log(Level.SEVERE, null, ex);
}
}
When I print out the variable full, I get the following location:
file:/C:/Users/rnaddy/Documents/NetBeansProjects/Phantom%20Browser/dist/run1534966744/Phantom_Browser.jar!/images/default.jpg
So, what am I doing wrong?

ImageIO knows how to read from jar files, so you can just say
BufferedImage bufferedImage = ImageIO.read(HomePage.class.getResource("/images/default.jpg"));
As for why your solution doesn't work, getResource returns a URL. If you print it out when you run your application through the jar, you'll see that it returns jar:file:/path/to/file for the resource, whereas if you ran getPath and printed that out, you'll see file:/path/to/file.
Presumably, ImageIO will handle the input differently depending on what kind of URL you pass in.

Load images in jar file

I'm trying to load an image from an executable JAR file.
I've followed the information from here, then the information from here.
This is the function to retrieve the images:
public static ImageIcon loadImage(String fileName, Object o) {
BufferedImage buff = null;
try {
buff = ImageIO.read(o.getClass().getResource(fileName));
// Also tried getResourceAsStream
} catch (IOException e) {
e.printStackTrace();
return null;
}
if (buff == null) {
System.out.println("Image Null");
return null;
}
return new ImageIcon(buff);
}
And this is how it's being called:
logo = FileConverter.loadImage("/pictures/Logo1.png", this);
JFrame.setIconImage(logo.getImage());
With this being a simple Object.
I'm also not getting a NullPointerException unless it is being masked by the UI.
I checked the JAR file and the image is at:
/pictures/Logo1.png
This current code works both in eclipse and when it's been exported to a JAR and run in a terminal, but doesn't work when the JAR is double clicked, in which case the icon is the default JFrame icon.
Thanks for you're help. It's probably only me missing something obvious.

I had a similar problem once, which turned out to be down to issues relative addressing and my path being in the wrong place somehow. I dug this out of some old code I wrote that made it use an absolute path. That seemed to fix my problem; maybe it will work for you.
String basePath = (new File(".")).getAbsolutePath();
basePath = basePath.substring(0, basePath.length()-1);
FileConverter.loadImage(basePath+"/pictures/Logo1.png", this);

how to get path of specific bufferedimage?

Hi I am trying to get path of BufferedImage but how to get path of that loaded image i don't know.
I am fetching image from Stack<>. one by one image fetched from it when user click on next button.
image changed using pop() method of stack.
code :
Stack<File> pictures ;
final JFileChooser file;
file = new JFileChooser();
file.setCurrentDirectory(dir);
file.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
file.showOpenDialog(panel);
String path = file.getSelectedFile().getAbsolutePath();
System.out.println(path);
pictures= getFilesInFolder(path.toString());
a=ImageIO.read(pictures.pop().getAbsoluteFile());
here a is Buffered Image instance.
now i want whole path of image that loaded in a.
anyone guide me ?

A BufferedImage does not maintain any information on how it is generated or where it is loaded from. You have to store the file path in a variable before loading the image:
File file = pictures.pop().getAbsoluteFile();
a=ImageIO.read(file);
// now you can use "file" for other purposes too

The Problem is that you have is that you can't read a Path from a BufferedImage so you have to use the File before you make a BufferedImage of it.
So you could use:
String path = stack.peek().getPath();
Now you have saved your path. At the moment you convert it into a BufferedImage use pop() so you remove it from the stack. With peek() you only look at the first Item without removing. Or you save your file into a temp file like
File temp = stack.pop();
Than you are able to use:
temp.getPath();

yes i have solve that using following code :
String p;
File f;
try
{
f= pictures.pop().getAbsoluteFile();
a=ImageIO.read(f);
p = f.getPath();
System.out.println(p);
}
catch (IOException e1)
{
e1.printStackTrace();
}

Jar Exportation Not Showing Images

I am a new programmer to Java. I have a made a small Directory Application that I would like to export, but for some reason, whenever I try to export it to a runnable jar file, the result doesn't contain any of the images I specified within my program. Basically, I ran it in eclipse, and it worked fine, but when I ran it as an runnable JAR, it has no images. I have 5 .java files that are all bundled with eachother. My Images are found at Images/Image.png [I already made The Images folder a source folder.]
I have tried eveything, but for some reason i can't get it to work, if you have any knowledge on the topic, please tell me. I don't know if its because I'm a noob or something I'm doing wrong.
static ImageIcon logoicon = new ImageIcon("Images/Logo.png");

Here is the method I use:
public static ImageIcon createImageIcon(final String path) {
InputStream is = ImageLoader.class.getResourceAsStream(path);
int length;
try {
length = is.available();
byte[] data = new byte[length];
is.read(data);
is.close();
ImageIcon ii = new ImageIcon(data);
return ii;
} catch (IOException e) {
LogManager.logCriticalProblem("Image not found at {} - {}", new Object[]{path, e.getMessage()});
}
return null;
}
If you have problems with this method, try altering the path you're using:
"Images/Logo.png"
"/Images/Logo.png"
"src/Images/Logo.png"
"/src/Images/Logo.png"
Or other combinations depending on your package structure. For example, if your images are actually in net.blah.fizz.Images, your path would be "/net/blah/fizz/Images/image.png"

Did you try getResourceAsStream() method ? Checkout this page for more information