Develop Reference

Reading Image Path in Java

I want to read the full path of an image located in my package to scale it so the image can fit my JLabel, however, everytime I compile my code the following error is produced:
javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(Unknown Source)
Code:
public void loadImage(){
BufferedImage img = null;
try {
img = ImageIO.read(new File("/myPackage/image.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
BufferedImage dimg = (BufferedImage) img.getScaledInstance(lblImage.getWidth(), lblImage.getHeight(),
Image.SCALE_SMOOTH);
ImageIcon imageIcon = new ImageIcon(dimg);
lblImage.setIcon(imageIcon);
contentPane.add(lblImage);
}
Thanks in advance! :)

How to resize image in JAVA to fit a jLabel?

Apparently, this is my code I have been using to get image from my disks to my program.
public void getVehicleImage(){
FileDialog fd = new FileDialog(this);
fd.setFile("*.jpg; *.jpg; *.png; *.gif");
fd.show();
vehicle_path = fd.getDirectory()+fd.getFile();
vehicleFileName.setText(vehicle_path = fd.getFile());
vehicleImagePath.setText(vehicle_path = fd.getDirectory()+fd.getFile());
image.setIcon(new ImageIcon(vehicle_path));
}
How do I fit the image to the size of my jLabel? I have tried using the
getScaledInstance()
but still no good. And also I want to ask if I am using the right code on how to get Image from my disk? I kinda feel it is wrong.

I faced similar problem and did below workaround:
Step1: Read the picture as a BufferedImage from your file system.
BufferedImage image = null;
try {
image = ImageIO.read(new File("fileName.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
Step2: Create a new BufferedImage that is the size of the JLabel
BufferedImage img= image.getScaledInstance(label.width, label.height,
Image.SCALE_SMOOTH);
Step3: Create new ImageIcon from the resized BufferedImage (Step 2)
ImageIcon imageIcon = new ImageIcon(img);
In your case, create a helper method and call it while creating ImageIcon as below:
public void getVehicleImage(){
...................
image.setIcon(new ImageIcon(getScaledImage(vehicle_path)));//call helper here
}
This can be helper function:
public BufferedImage getScaledImage(String imagePath){
BufferedImage image = null;
try {
image = ImageIO.read(new File("fileName.jpg"));
} catch (IOException e) {
e.printStackTrace();
}
BufferedImage img= image.getScaledInstance(label.width, label.height,
Image.SCALE_SMOOTH);
return img;
}

How to load an image into a JPanel using Java

I would like to use an image as the background of a JPanel.
It needs to be loaded from a relative file path.
private void createBackground() {
try {
BufferedImage backgroundImage = ImageIO.read(new File("C:/Users/Developer/workspace/Java/BSC_Project/Application/src/resources/background.jpg"));
JLabel background = new JLabel(new ImageIcon(backgroundImage));
this.add(background);
} catch(IOException e) {
System.out.println(e.toString());
}
}
My current code is not working. Any help would be appreciated.

So can't comment(need 50 rep) but your file path is completely wrong
you need it to be something like this
new File("C:/Users/"Insert Username"/Desktop/workspace/Java/BSC_Project/Application/src/resources/background.jpg")
except I'm not on your computer so you need to figure out your own file path, This would be assuming your workspace folder is on your Desktop which it almost certainly isn't, do you understand?

Well if you want your code to have a panel this is what you would do...
private void createBackground() {
try {
BufferedImage backgroundImage = ImageIO.read(new File("C:/Users/Developer/workspace/Java/BSC_Project/Application/src/resources/background.jpg"));
JPanel panel = new JPanel();
JLabel background = new JLabel(new ImageIcon(backgroundImage));
panel.add(background);
this.add(panel);
} catch(IOException e) {
System.out.println(e.toString());
}
}
but in your case it looks to me like you want a frame background as image... to which you can set the image background to which for that one you can try this code
JFrame f = new JFrame ("SettingBackGround");
try{
f.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("Med.jpg")))));
}catch (IOException e){
System.out.println("Image Doesnt Exist");
}
f.setVisible(true);
f.setResizable(false);
f.pack();
}
}
I hope this helps though.

public WelcomeView() {
initComponents();
try {
image = ImageIO.read(new File("C:\\Users\\Developer\\workspace\\Java\\BSC_Project\\Application\\src\\application\\resources\\background.png"));
} catch (IOException ex) {
System.err.println(ex.toString());
}
}
private BufferedImage image;
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 2, 0, null); // see javadoc for more info on the parameters
}

Display and writing of image in java

I am unable to display the image as there's problem in the main method and i am not sure whether did i write the image correctly. Sorry, I am really new to Java.
public class Display extends JPanel
{
String path = "C:/Users/asus/workspace/Code/src/7horses.jpg";
File file = new File(path);
static BufferedImage img;
img = ImageIO.read(new File(file));
public static BufferedImage CopyImage (File file)
{
BufferedImage cImg = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics g = cImg.createGraphics();
g.drawImage(img, 0, 0, null);
g.dispose();
File saveImage = new File("C:/Users/asus/workspace/Code/src", saveAs);
ImageIO.write(cImg, "png", saveImage);
return cImg;
}
public static void main(String[] args)
{
JFrame f = new JFrame("Show Image");
LoadImage panel = new BufferedImage CopyImage(file);//
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(panel);
f.pack();
f.setLocation(200,200);
f.setVisible(true);
}
}
After duplicate the image, i am not sure how to display the duplicate copy. Below was the code which i initially use for loading and displaying.
public class LoadImage extends JPanel
{
BufferedImage img;
String path = "C:/Users/asus/workspace/MP/src/7horses.jpg";
File file = new File(path);
public void paint(Graphics g)
{
g.drawImage(img, 0, 0, null);
}
public LoadImage()
{
try
{
img = ImageIO.read(file);
}
catch (IOException e)
{
e.printStackTrace();
}
}
public static void main(String[] args)
{
JFrame f = new JFrame("Show Image");
LoadImage panel = new LoadImage();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(panel);
f.pack();
f.setLocation(200,200);
f.setVisible(true);
}
}

There's a few things wrong with this code..
path and file cannot be accessed by main() because they are not static and main is. Meaning when main() is ran, neither of path or file exist.
LoadImage panel = new BufferedImage CopyImage(file) is not valid Java - I'm not sure what you were trying to do but I guess you want to remove the new BufferedImage part
img = ImageIO.read(new File(file)); - you can't run this statement outside a method or static block as it requires handling of an IOException
ImageIO.read(new File(file)); - file is already of type File and you are passing it to a type File, not necessary. ImageIO.read(file); would do
saveAs hasn't been defined anywhere.
ImageIO.write(cImg, "png", saveImage); can throw an IOException so you need to add a try-catch around it like in the LoadImage() constructor or append throws IOException to your method signature like so public static BufferedImage CopyImage (File file) throws IOException
You are referencing LoadImage which looks like it's trying to do exactly what Display does in a slightly different way. I'm not sure what to advise here because I don't understand the intention but I think perhaps replace LoadImage in the Display code with Display

Maybe:
Use ImageIO to retrieve a BufferedImage from your file.
Using an ImagePanel that can use a Buffered Image to display on
your JFrame
It would be something more like that:
public class Display extends JPanel {
private static final long serialVersionUID = 1L;
private static final String path = "C:/Users/asus/workspace/Code/src/7horses.jpg";
private static final File file = new File(path);
public static void main(String[] args) throws IOException {
JFrame f = new JFrame("Show Image");
BufferedImage image = ImageIO.read(file);
ImagePanel panel = new ImagePanel(image);//
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setContentPane(panel);
f.pack();
f.setLocation(200, 200);
f.setVisible(true);
}
public static class ImagePanel extends JPanel {
private static final long serialVersionUID = 1L;
private BufferedImage image;
public ImagePanel(BufferedImage image) {
this.image = image;
}
#Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, null); // see javadoc for more info on the parameters
}
}
}

What is a LoadImage? Unless it's both a BufferedImage AND a Container your code won't even compile.
And as a class can't be both a Container and a BufferedImage at the same time (given that both are classes, not interfaces, and multiple inheritance at class level doesn't exist in Java) your code can't work.
You're going to have to figure out how to correctly initialise your LoadImage instance, and only the documentation (and possibly source) of that class is going to help you.

Can't define a path to an image

I imported an image into Eclipse, in the same package as this class:
public class mainWindow extends JFrame {
public mainWindow() {
Image bg = // \mainPackage\ShittyPlane.png;
Graphics2D g2d;
this.setSize(500,500);
this.setResizable(false);
this.setTitle("GameTest");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setVisible(true);
g2d.drawImage(bg, 0, 0, null);
}
}
How do I define the image path?

If the image is part of you source and is packed into jar later for distribution i would sucgest you get a stream to the image using getResourceAsStream.
ClassLoader cl = getClass().getClassLoader();
InputStream is = cl.getResourceAsStream("mainPackage/ShittyPlane.png");
BufferedImage image = ImageIO.read(is);
this aproache will also work in if you run the program from your IDE
If you plan to locate the image using a a File chooser then go with #Pescis's answer.

What you need to do to load an image from a specific file is:
BufferedImage img = null;
try {
img = ImageIO.read(new File("src/mainPackage/ShittyPlane.png")); //I'm guessing this is the path to your image..
} catch (IOException e) {
}
For more info you can read the javadoc on working with images.