I am using the following code for displaying the Image on the swing frame.
ImageIcon icon = new ImageIcon("image.jpeg");
icon.getImage().flush();
jLabel3.setIcon( icon );
I need a button which when clicked upon will save the image with a jpeg/png extension .
I usually do something like this
Image img = icon.getImage();
BufferedImage bi = new BufferedImage(img.getWidth(null),img.getHeight(null),BufferedImage.TYPE_BYTE_ARGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, 0, 0, null);
g2.dispose();
ImageIO.write(bi, "jpg", new File("img.jpg"));
also try other image types like BufferedImage.TYPE_INT_RGB, checkout BufferedImage
you may also want to read this Writing/Saving an Image
hope it works for you
consider useing ImageIO.write(Image img, String type, File file) for writeing a Image to the filesystem.
You get an Image object from the ImageIcon with getImage()
You have to Implement a ActionListener for the Button, and then you are ready to go
So the first part is implementing actionlistener so the button works when you click it. The JButton.
The second part is saving the image which i use ImageIo.write
See code below
public class MyFrame extends JFrame implements ActionListener {
private JButton button1 = new JButton("Click me!");
public MyFrame() {
button1.addActionListener(this);
//... add buttons to frame ...
}
public void actionPerformed(ActionEvent evt) {
Object src = evt.getSource();
if (src == button1) {
string imagename = icon.getDescription;
try {
// retrieve image
BufferedImage bi = icon.getImage();
File outputfile = new File("saved.png");
ImageIO.write(bi, "png", outputfile);
} catch (IOException e)
{
//catch the exception here
}
}
}
}
Related
I'm writing a little photo application (asked some questions before) and I have one problem which I cannot resolve. The idea is that there are two sections: the upper one is for an overview (using thumbnails) and the lower one shows the selected image in it's full size. I cannot use ImageIO (required by my lecturer).
I'm using a JList for the overview but most images are not visible. I chose a folder with about 20 images and only 2 show up. And one of them isn't even centered.
For some reason, if I delete those lines:
thumbnaillist.setFixedCellWidth(thumbW);
thumbnaillist.setFixedCellHeight(thumbH);
One image shows up that wasn't visible before, but now the other two disappear.
This is my code:
public class PVE extends JFrame {
private JFileChooser fileChoose;
//MenuBar
private JMenuBar menubar;
private JMenu file;
private JMenuItem openFolder;
private JMenuItem exit;
//Thumbnails
private JList thumbnaillist;
private DefaultListModel<ImageIcon> listmodel;
private JScrollPane tscroll;
private ImageIcon thumbs;
private int thumbW = 100;
private int thumbH = 100;
//for full size view
private JPanel imgview;
public PVE() {
setLayout(new BorderLayout());
//MenuBar
menubar = new JMenuBar();
file = new JMenu("File");
openFolder = new JMenuItem("Open folder...");
exit = new JMenuItem("Quit");
file.add(openFolder);
file.addSeparator();
file.add(exit);
menubar.add(file);
setJMenuBar(menubar);
fileChoose = new JFileChooser();
openFolder.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
fileChoose.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
fileChoose.showOpenDialog(null);
File chosenDir = fileChoose.getSelectedFile();
loadToThumbView(chosenDir);
}
});
//Thumbnail view
listmodel = new DefaultListModel();
thumbnaillist = new JList(listmodel);
thumbnaillist.setLayoutOrientation(JList.HORIZONTAL_WRAP);
thumbnaillist.setFixedCellWidth(thumbW);
thumbnaillist.setFixedCellHeight(thumbH);
thumbnaillist.setVisibleRowCount(1);
tscroll = new JScrollPane(thumbnaillist, JScrollPane.VERTICAL_SCROLLBAR_NEVER,
JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
tscroll.setPreferredSize(new Dimension(0, 100));
add(tscroll, "North");
//for full size view
imgview = new JPanel();
imgview.setBackground(Color.decode("#f7f7f7"));
add(imgview, "Center");
setTitle("Photo Viewer");
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
SwingUtilities.updateComponentTreeUI(this);
} catch (Exception e) {
}
setSize(700, 700);
setLocation(200, 200);
setVisible(true);
}
public void loadToThumbView(File folder) {
listmodel.removeAllElements();
File[] imgpaths = folder.listFiles();
for (int j = 0; j < imgpaths.length; j++) {
listmodel.addElement(resizeToThumbnail(new ImageIcon(imgpaths[j].toString())));
}
}
public ImageIcon resizeToThumbnail(ImageIcon icon) {
Image img = icon.getImage();
BufferedImage bf = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
Graphics g = bf.createGraphics();
g.drawImage(img, 0, 0, thumbW, thumbH, null);
ImageIcon kB = new ImageIcon(bf);
return kB;
}
public static void main(String argv[]) {
PVE pv = new PVE();
}
}
Your problem is because of the way you're scaling your images.
I'm not exactly sure why but I guess it has something to do with the BufferedImage#createGraphics() call and that I was able to reproduce the problem with .jpg images while .png files were correctly painted.
However if you scale your images instead of converting them to a BufferedImage and getting a new ImageIcon from it, you get the correct output:
public ImageIcon resizeToThumbnail(ImageIcon icon) {
Image img = icon.getImage();
Image scaled = img.getScaledInstance(thumbW, thumbH, Image.SCALE_SMOOTH);
return new ImageIcon(scaled);
}
This is the folder I used to test:
And the outputs with your code and mine:
Important notes
And as as a recommendation don't make a window that big if all you're using is that little bar above. If you're adding something else below, then it's ok but for now it's not that "user friendly" (IMHO). Instead of JFrame#setSize() you could try using JFrame#pack() method so your frame resizes to it's preferred size.
Some other things I noted in your program:
You're not placing it inside the Event Dispatch Thread (EDT) which is dangerous since your application won't be Thread safe that way. You can change that if you change your main method as follows:
public static void main(String argS[]) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
PVE pv = new PVE();
}
});
}
You're setting the JScrollPane preferred size, instead you should override its getPreferredSize() method, see Should I avoid the use of setPreferred|Maximum|MinimumSize methods in Java Swing? (YES)
You're extending JFrame, you should instead create an instance of it unless you're overriding one of its methods (and you're not, so don't do it) or you have any good reason to do it. If you need to extend a Container you should extend JPanel instead, as JFrame is a rigid container which cannot be placed inside another one. See this question and this one.
I think I'm not missing anything, and hope this helps
Your “scaled” images are actually images which are the same size as the original image, but are blank except for a scaled version drawn in the upper left corner. That upper left corner is clipped out of view in each rendered cell (at least for the somewhat large images I tested with).
The scaled image needs to be created with the thumbnail size, not the size of the original image. Meaning, change this:
BufferedImage bf = new BufferedImage(img.getWidth(null), img.getHeight(null), BufferedImage.TYPE_INT_ARGB);
to this:
BufferedImage bf = new BufferedImage(thumbW, thumbH, BufferedImage.TYPE_INT_ARGB);
I have a BMP in a bytearray. I would like to display the BMP in an Eclipse Plugin using SWT.
If I want to display the BMP using swing - it can be done as follows:
BufferedImage bufferedImage = null;
try {
bufferedImage = ImageIO.read(new ByteArrayInputStream(getLocalByteArray()));
} catch (IOException ex) {
}
JLabel jLabel = new JLabel(new ImageIcon(bufferedImage));
JPanel jPanel = new JPanel();
jPanel.add(jLabel);
this.add(jPanel);
Update:
The BMP will be represented as a byte array. This is pre requisite of this.
How do I do this in an Eclipse Plugin using SWT? Note I am using a Perspective.
An SWT Image can directly be created from an input stream. Several data formats are supported, including Windows format BMPs.
For example:
Image image = new Image( display, new ByteArrayInputStream( ... ) );
The resulting image can then be set on a Label or used elsewhere.
You can simply specify the file in the Image constructor and then set it to a Label.
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Label label = new Label(shell, SWT.NONE);
Image image = new Image(display, "image.bmp");
label.setImage(image);
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
image.dispose();
}
Remember that you have to dispose() of the image yourself to not create a memory leak.
OK - I figured it out. As the code is short I've included the context:
public void createPartControl(Composite parent) {
try {
BufferedInputStream inputStream = new BufferedInputStream(new ByteArrayInputStream(getLocalByteArray()));
ImageData imageData = new ImageData(inputStream);
Image image = ImageDescriptor.createFromImageData(imageData).createImage();
// Create the canvas for drawing
Canvas canvas = new Canvas( parent, SWT.NONE);
canvas.addPaintListener( new PaintListener() {
public void paintControl(PaintEvent e) {
GC gc = e.gc;
gc.drawImage( image,10,10);
}
});
I have a JFrame which has 4 different Panels. The Black box on right in the image below is the Image Panel. I am trying to write a Class that will allow me to load an image into any Panel within any other class in my program.
http://sdrv.ms/14TEq2T
LoadImage.java
package sf;
import java.awt.*;
import java.awt.image.*;
import javax.swing.ImageIcon;
public class LoadImage extends Component {
BufferedImage img;
public void paint(Graphics g) {
g.drawImage(img, 0, 0, null);
}
public LoadImage(String filename) {
try {
System.out.println(filename);
img = new ImgUtils().scaleImage(380, 360, filename);
} catch (Exception e) {
System.out.println("File not found");
}
}
class ImgUtils {
public BufferedImage scaleImage(int WIDTH, int HEIGHT, String filename) {
BufferedImage bi = null;
try {
ImageIcon ii = new ImageIcon(filename);
bi = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = (Graphics2D) bi.createGraphics();
g2d.addRenderingHints(new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY));
g2d.drawImage(ii.getImage(), 0, 0, WIDTH, HEIGHT, null);
} catch (Exception e) {
e.printStackTrace();
return null;
}
return bi;
}
}
}
Code that I use to load in the Image in my other Classes.
private void getProductImage() {
try {
String path = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();
String decodedPath = URLDecoder.decode(path, "UTF-8");
String newPath = decodedPath.replace("build/classes/", "src/productImages/");
productImagePanel.add(new LoadImage(newPath + imageCode + ".jpg"));
revalidate();
pack();
} catch (Exception e) {
e.printStackTrace();
}
}
The 'imageCode' is the code that is retrieved from database once the Window is visible and I have checked the Path to images several times.
The LoadImage.java works on its own and load the images if a 'main runnable' method is added to it, however I can't seem to display the image in the panel I want. Please advice on how to fix my problem, any help is appreciated!
Your problem could very well be you're trying to load the image as a component to the JPanel. Problems include:
the preferredSize of the Component could well be [0, 0], and so it can be trying it's little heart out to display an image but just be too small to do so.
There could be other components already added to the JPanel
The JPanel's layout may not play nice with newly added components.
You shouldn't mix heavy weight (Component) with light weight (most all other non-top level Window Swing components) without a definite need.
I suggest:
Add a JLabel to your image displaying JPanel just once on JPanel creation.
Give your productImagePanel a method that accepts an Image or an ImageIcon and then either creates the ImageIcon from the Image or uses the ImageIcon provided to set the Icon of the JLabel.
Be sure that the JPanel uses a layout that allows the JLabel to display itself fully. The layout manager tutorials can help with this.
Either that or all the image displaying JPanel is for is to show the image and nothing else, get rid of it and instead use a JLabel by itself, and add your Icons directly to it.
Also as an aside: you should be disposing any Graphics and Graphics2D objects that you create (but not any given to you by the JVM). That means that when you're done drawing with g2d in your ImageUtilities, dispose of it.
I am trying to load an image into a JPanel using JFileChooser. But when I try to run the program and load a selected image nothing happens in the JPanel. I am attaching the source code snippet here:
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
FileFilter filter = new FileNameExtensionFilter("Image files","jpeg","jpg");
fileChooser.setFileFilter(filter);
int result = fileChooser.showOpenDialog(null);
if(result == fileChooser.APPROVE_OPTION){
imgFile = fileChooser.getSelectedFile();//imgFile is File type
try{
myPicture = ImageIO.read(imgFile);//myPicture is BufferedImage
JLabel picLabel = new JLabel(new ImageIcon( myPicture )) ;
imagePanel.add( picLabel );
imagePanel.repaint();
System.out.println("You have selected "+imgFile);
}catch(Exception e){
e.printStackTrace();
}
}
}
Can anyone shed light on this?
The problem is that I have added two panels in my frame.
You might compare what you're doing with this complete example that uses two panels: a file chooser on the left and a display panel on the right.
I think this might help you...
Object selectedItem = jComboBox14.getSelectedItem();
ImageIcon picturetoInsert = new ImageIcon(selectedItem.toString());
JLabel label = new JLabel("", picturetoInsert, JLabel.CENTER);
JPanel panel = new JPanel(new GridLayout(1, 1));
panel.add(label, BorderLayout.CENTER);
jInternalFrame22.getContentPane();
jInternalFrame22.setContentPane(panel);
jInternalFrame22.setVisible(true);
Why don you try with the paint component?
class imagePanel extends JPanel
{
BufferedImage image;
public void paintComponent(Graphics g)
{
super.paintComponent(g);
if(image != null)
{
g.drawImage(image, 0, 0, this);
}
}
}
There could be a few reasons for this. You could try
imagePanel.invalidate()
before the repaint call to force it to redraw.
Or possibly the label is to small and needs resizing since there may not have been an image before. You could try invoke the
frame.pack();
method to get the frame to recompute its component sizes.
Or you could try force the size of the label (setting its min size) to ensure it has enough space to show the image.
How to display an image to JPanel or to JLabel using the BufferedImage?
I load an Image using FileChooser and I need to display what I've loaded.
I don't extend my class to any container.
Override paintComponents(g) paintComponent(g) method of JPanel or JLabel and draw image in it. Something like follow:
JPanel panel = new JPanel(){
#Override
public void paintComponent(Graphics g) {
BufferedImage image = null; // get your buffered image.
Graphics2D graphics2d = (Graphics2D) g;
graphics2d.drawImage(image, 0, 0, null);
super.paintComponents(g);
}
};
Same thing for JLabel. Or in another way:
BufferedImage image = null; // get your buffered image.
ImageIcon icon = new ImageIcon((Image)image);
JLabel label = new JLabel();
label.setIcon(icon);
As you are saying that you are loading image from FileChooser it can be done in following
way:
ImageIcon icon = new ImageIcon(
fileChooser.getCurrentDirectory().toString()
+"/"+fileChooser.getSelectedFile().getName());
Now you can use ImageIcon in JLabel or add it in JPanel.
Above code is sample code and not tested so not necessary to run without error. You might need to change it as per your need.