Jpeg in JPanel

how can i add A jpeg image to a JPanel ?

GO back to the newbie forum where you posted it, there is an answer there - AND STOP CROSS POSTING OR ANSWERS WILL STOP COMING !!!!!

Similar Messages

Creating screenshot without using BufferedImage?

Hi all java gurus!
I'm almost wrecked by searching for a solution for the following problem:
I have a JPanel with some graphs and text on it, drawn by paint(...) method.
So far so good.
Now I want to print this panel. No problem, as long as I print the panel content directly via paint(..) method to printer.
But in my case I need to create a screenshot of this panel (because I wrote a multiple-page-print-preview-dialog controlled by a script language and java objects to print).
I did it by using a BufferedImage object, got its Graphics object and used paintAll(...) to draw the panel to image. Works great!.
But now I get into trouble: To print that image I need to scale it (mostly by factor 0.65), but BufferedIamge objects are of very low resolution so that the printing looks absolutely ugly. Even when I switched on Antialiasing, the result is absolutely not readable.
I also tried to pass the complete JPanel object to printer, but every of the three printers layed it out differently...!!!???
Is there another object that allows higher resolution?
Or is there a way to store a jpanel directly and with high resolution into a jpeg file??
I have no more ideas and was looking all around the (internet)world for a solution since 1 week, but never found anything that fits/solves my problem.
Best regards and thnx for any inspiration
Thoto

i am doing exactly same as you, i used BufferedImage as well, but i dose not face the problem as you.
my method to save as JPeg on JPanel is as follow:
public void saveAsJpeg(int quality, String path){
     BufferedImage bi = new BufferedImage(this.getWidth(),this.getHeight(),BufferedImage.TYPE_3BYTE_BGR);
     Graphics g = bi.getGraphics();
     this.printAll(g);
     JPEGHandler.saveJPG(bi,(float)quality/100, path);
if possible, u may send me the codes to help u
[email protected]

How to save content of JPanel into jpeg or png file

I have to independent classes: Class A and Class B. Each class constructs its own graphical objects:
Class A {
//do something
public void paintComponent(Graphics g)
int x = 0;
int y = 0;
int w = getSize().width;
int h = getSize().height;
bi = new BufferedImage(
w,h,100,BufferedImage.TYPE_INT_RGB);
g2d = bi.createGraphics();
// draw lines
g2d.drawImage(bi,0,0,ww,hh, this);
Class B {
int x = 0;
int y = 0;
int w = getSize().width;
int h = getSize().height;
bi = new BufferedImage(
w,h,100,BufferedImage.TYPE_INT_RGB);
g2d = bi.createGraphics();
// draw lines
g2d.drawImage(bi,0,0,ww,hh, this);
Two buffered images get properly displayed within JPanel component. However, I need to save two those results into one file. If I add saving file routine into every class, at best I can only get them to be in two different files.
Please let me know if anyone can help me with this problem.
Thanks,
Jack

You didn't mention what should be the format of file that the combines the images. Here are two options:
1. Create another BufferedImage, and draw the BufferedImages from class A and B over this BufferedImage and save it as JPEG or PNG.
In each of the class, you can add a method like getBufferedImage(), which would return the local BufferedImage. A third class, say class C, needs to call this method in each of the classes, and then draw the BufferedImages returned by these methods over another BufferedImage. Save this BufferedImage as a JPEG or PNG.
A disadvantage of this approach is that you can't easily retrieve the individual images from the resulting file.
2. Create a single zip file by adding the individual JPEG/ PNG images created from the BufferedImage in class A and B.
Here is an example that creates single zip file of JPEG images from an array of BufferedImageObjects:
public static void zip(String outfile, BufferedImage bufimage[]){
     if(bufimage == null) return;
     try{
         File of = outfile.endsWith(".zip")? new File(outfile): new File(outfile+".zip");
         FileOutputStream fos = new FileOutputStream(of);
         ZipOutputStream zos = new ZipOutputStream(fos);
         for(int i=0;i<bufimage.length;i++){
             try{
                ByteArrayOutputStream boutstream = new ByteArrayOutputStream();
                JPEGImageEncoder enc = JPEGCodec.createJPEGEncoder(boutstream);
                enc.encode(bufimage);
ZipEntry entry = new ZipEntry("bufimage"+(new Integer(i)).toString()+".jpg");
entry.setMethod(ZipEntry.DEFLATED);
zos.putNextEntry(entry);
byte[] fileBuf = boutstream.toByteArray();
zos.write(fileBuf,0,fileBuf.length);
zos.closeEntry();
} catch (Exception e){ e.printStackTrace();}
zos.flush();
zos.close();
}catch(Exception e) {e.printStackTrace();}
The above method uses the JPEG codec and the zip package, both of which available in J2SE. In other words, you need to import com.sun.image.codec.jpeg and java.util.zip packages.
With this approach, you can easily retrieve the individual JPEGs using the java.util.zip package.

Problem in saving a grafic as a jpeg,the grafic is drawed on a jpanel!

I can't save a grafic as a jpeg!
When i save the jpanel content i get a blank picture!
Can someone give an example ?
Thanks in advance!
Message was edited by:
kynamar

private void save_jpg()
//pScale - method that draw's the grafic on the jpanel
pScale(datanal(tabel.getRowCount(),col_1,coloane_selectate.get(coloanele.nextElement())),pane);
BufferedImage myImage = new BufferedImage(pane.getWidth(),pane.getHeight(),BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = myImage.createGraphics();
pane.paint(g2);
     try {
         OutputStream out = new FileOutputStream("1grafic.jpg");
         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param =encoder.getDefaultJPEGEncodeParam(myImage);
          //the first parameter here is the "quality v file size" trade-off
          //play with this value (0-1) to determine the best results for you
          param.setQuality(0.9f, true);
          encoder.encode(myImage, param);
          out.flush();
          out.close();
       } catch (Exception ec) {
         System.out.println(ec);
       }

Jpeg or gif inside JPanel

how do i put an image into a JPanel ?

If you're using Swing, then look into using an ImageIcon inside a JLabel. If not, then load the gif or jpeg into an Image instance and overriding the paint() method of a panel.

Java Swing - save JPanel as GIF/JPEG.

WE are using Java swing to draw graph(Genes, SNP ,repeats etc related to bio-informatics).text files we are using are quite big eg- more than 25 MB. first it makes the process slow.One of our problem is to save whatever "we draw as an image file(GIF/JPEG file)" and another problem is save a data in a data structure(array,vector) which grow upto 15-20 MB.
plotting this data makes the speed too slow.We want to optimize this.

For saving images have a look at JAI - the Java Advanced Imaging API. It's got fairly straightforward ways of saving images. Note that saving as GIF images is not recommended; patents were placed on the encoding so it's no longer a free option. PNG will give you lossless compression like GIF but is more flexible.
http://java.sun.com/products/java-media/jai/
Saving the generated (mined?) data structure for future retrieval can be quite straightforward depending on how you're doing it. The easiest way is simply to serialise it (use an ObjectOutputStream) but this has compatibility problems if you change your data structure.
Saving out in a custom format may seem like a lot of work but it's not all that hard to do. Alternatively you can use one of the Java to XML convertors - in your case this might generate too large a file, however.
YOu can always use Java's zip functions to improve file size should this become problematic.
Hope this helps

How to update a JPanel in a JApplet

Hi All,
I'm trying to make my own sudoku JApplet. JApplet uses a BorderLayout() adding the sudoku Puzzle in the center, JButtons for New Games in a JPanel in the west and a GridLayout(3,3) to select the number to put in the puzzle in the east.
The problem is: how can i update the sudoku puzzle in the center by clicking the "new game" JButton in the west?
I use JButtons to represent numbers in the puzzle. this is how i create the JButton and set its ActionListener().
     public static JButton casella(String[] casella) {
          final JButton b = new JButton(casella[0]);
          b.setFont(new Font("SansSerif",Font.BOLD,33));
          if(casella[3].equals("1"))
               b.setBorder(BorderFactory.createLineBorder(Color.orange));
          if(casella[3].equals("2"))
               b.setBorder(BorderFactory.createLineBorder(Color.red));
          else
               b.setBorder(BorderFactory.createLineBorder(Color.black));
          b.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e) {
                    if(Sudoku.NUMERO_CORRENTE>=0)
                         b.setText(String.valueOf(Sudoku.NUMERO_CORRENTE));
                    else
                         b.setText("_");
          return b;
     }this is the main class:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Sudoku extends JApplet {
     static String[][][] MATRICE = MatriceCompleta.sudoku().getArrayMatrice();
     static JPanel PANNELLO_NUMERICO = OggettiGrafici.pannelloNumerico();
     static JPanel PANNELLO_EAST = new JPanel(new GridLayout(3,1));
     static JPanel PANNELLO_WEST = new JPanel(new GridLayout(6,1));
     static JPanel PANNELLO_CASELLE = new JPanel(new GridLayout(3,3));
     static JPanel PANNELLO = new JPanel(new BorderLayout());
     static int POSIZIONE_CASELLA_X = 0;
     static int POSIZIONE_CASELLA_Y = 0;
     static int NUMERO_CORRENTE = 0;
     static JLabel LABEL_NUMERO_CORRENTE = new JLabel(String.valueOf(NUMERO_CORRENTE), JLabel.CENTER);
     static JLabel LABEL_PARTITA = new JLabel("",JLabel.CENTER);
     static JLabel LABEL_NUOVA_PARTITA = new JLabel("NUOVA PARTITA",JLabel.CENTER);
     static JButton FACILE = new JButton("Livello Facile");
     static JButton NORMALE = new JButton("Livello Medio");
     static JButton DIFFICILE = new JButton("Livello Difficile");
     static JButton CONTROLLA_ERRORI = new JButton("Controlla Errori");
     static JButton CANCELLA_NUMERO = new JButton("Cancella Numero");
     static String DIFFICOLTA = "NORMALE";
     static int i, j, k;
     public void init() {
          String[][][][] divisaInPannelli = ComandiUtili.divisioneInPannelli(MATRICE);
          JPanel p0 = new JPanel(new GridBagLayout());
          JPanel p1 = new JPanel(new GridBagLayout());
          JPanel p2 = new JPanel(new GridBagLayout());
          JPanel p3 = new JPanel(new GridBagLayout());
          JPanel p4 = new JPanel(new GridBagLayout());
          JPanel p5 = new JPanel(new GridBagLayout());
          JPanel p6 = new JPanel(new GridBagLayout());
          JPanel p7 = new JPanel(new GridBagLayout());
          JPanel p8 = new JPanel(new GridBagLayout());
          GridBagConstraints c = new GridBagConstraints();
          c.fill = GridBagConstraints.BOTH;
                // creating the sudoku puzzle panel using JButtons
          for(i=0;i<9;i++) {
               for(j=0;j<3;j++) {
                    for(k=0;k<3;k++) {
                         JButton b = OggettiGrafici.casella(divisaInPannelli[i][k][j]);
                         c.gridx = j;
                         c.gridy = k;
                         c.ipadx = 42;
                         c.ipady = 12;
                         if(i==0)
                              p0.add(b,c);
                         else if(i==1)
                              p1.add(b,c);
                         else if(i==2)
                              p2.add(b,c);
                         else if(i==3)
                              p3.add(b,c);
                         else if(i==4)
                              p4.add(b,c);
                         else if(i==5)
                              p5.add(b,c);
                         else if(i==6)
                              p6.add(b,c);
                         else if(i==7)
                              p7.add(b,c);
                         else if(i==8)
                              p8.add(b,c);
          PANNELLO_CASELLE.add(p0);
          PANNELLO_CASELLE.add(p1);
          PANNELLO_CASELLE.add(p2);
          PANNELLO_CASELLE.add(p3);
          PANNELLO_CASELLE.add(p4);
          PANNELLO_CASELLE.add(p5);
          PANNELLO_CASELLE.add(p6);
          PANNELLO_CASELLE.add(p7);
          PANNELLO_CASELLE.add(p8);
          PANNELLO_EAST.add(PANNELLO_NUMERICO);
          PANNELLO_EAST.add(LABEL_NUMERO_CORRENTE);
          PANNELLO_EAST.add(LABEL_PARTITA);
          PANNELLO_WEST.add(LABEL_NUOVA_PARTITA);
          PANNELLO_WEST.add(FACILE);
          PANNELLO_WEST.add(NORMALE);
          PANNELLO_WEST.add(DIFFICILE);
          PANNELLO_WEST.add(CONTROLLA_ERRORI);
          PANNELLO_WEST.add(CANCELLA_NUMERO);
          PANNELLO.add(PANNELLO_CASELLE, BorderLayout.CENTER);
          PANNELLO.add(PANNELLO_EAST, BorderLayout.EAST);
          PANNELLO.add(PANNELLO_WEST, BorderLayout.WEST);
          add(PANNELLO);
     public void paint(Graphics g) {
          super.paint(g);
}How can i update the sudoku puzzle (JPanel with 9x9 JButtons) by clicking on a "new game" JButton?
Thank You very much in advance!

Hi SD,
How are you drawing the image on the JPanel?
Are you using JLabel with image and adding it to Panel or using
drawImage to get the image on the panel (Only jpeg and gif formats are supported here).
DrawImage should automatically refresh, if not call repaint().
That should refresh the Screen.
Regards
Chandra Mohan

Using an Animated GIF/JPEGs Effectively

I have an animated GIF in an applet with around 200 frames, moving at a speed of 6 frames per second. However, when just drawing it in paint(), it looks extremely messy with the flashing. Then I tried another tack, and exported the gif as 200 jpeg files and used double buffering to draw it in a JPanel with the following code:
public void load()
     images = new ImageIcon[numImages];
     for (int i=0; i<images.length; i++)
          String num = "" + i;
          if (num.length() == 1)
               num = "00" + i;
          if (num.length() == 2)
               num = "0" + i;
          images[i] = new ImageIcon(dir + imageNm + num + ".jpg");
     setSize(getPreferredSize());
     startAnim();
public void paintComponent(Graphics g)
     super.paintComponent(g);
     if (images[currentImage].getImageLoadStatus() == MediaTracker.COMPLETE)
          images[currentImage].paintIcon(this, g, 0, 0);
          currentImage = (currentImage + 1) % numImages;
public void startAnim()
     if (animTimer == null)
          currentImage = 0;
          animTimer = new Timer(animDelay, this);
          animTimer.start();
     else if (!animTimer.isRunning())
          animTimer.restart();
public void actionPerformed(ActionEvent e)
     if (currentImage == numImages-1)
          stopAnim();
     repaint();
public void stopAnim()
     animTimer.stop();
}However, the outOfMemory Exception appears after loading approximately the first 50 stills. Any suggestions, besides having to extend the memory usage?

deltacoder, I tried what you suggested in the code below, to keep the images inside an array of 20 and to rotate them as soon as the image is displayed.
public void init()
     images = new ImageIcon[20];
     for (int i=0; i<20; i++)
          String num = "" + i;
          if (num.length() == 1)
               num = "00" + num;
          if (num.length() == 2)
               num = "0" + num;
          images[i] = new ImageIcon(dir + imageNm + num + ".jpg");
public void paintComponent(Graphics g)
     super.paintComponent(g);
     if (images[currentImage%20].getImageLoadStatus() == MediaTracker.COMPLETE)
          images[currentImage%20].paintIcon(this, g, 0, 0);
          if (currentImage < (numImages-21))
               String numStr = "" + (currentImage + 20);
               if (numStr.length() == 1)
                    numStr = "00" + numStr;
               if (numStr.length() == 2)
                    numStr = "0" + numStr;
               images[currentImage%20] = new ImageIcon(dir + imageNm + numStr + ".jpg");
          currentImage++;
}However, for some reason, it is still laggy. Can you perhaps see why from my code? must41, I am also working on your suggestion. In your thread for loading images, shouldn't there be some sleep time? Otherwise, the thread might get ahead of itself and cause outofmemory exception. And from what I know, whenever garbage collect runs, the code will run laggier than usual no matter what. Perhaps, I should have mentioned earlier, but there is also an AudioClip playing in the background (which does take up memory itself) that I like to match to the images (which i know will match because i made the animation using Flash MX), which is why I can't afford the lag from the garbage collecting.
Perhaps there is a way to combine both of your suggestions?

How do I draw an image on a JPanel?

To be honest I have no idea even where to start. I tried hacking through the tutorials but it just didn't help me (normally they do, I don't what's up).
Anyway, so what I'm trying to do is build a game. The Graphics2D is great for simple shapes but drawing characters is getting kind of ridiculous (tedious + difficult + looks bad). So, I need to figure out how to display an image on a JPanel.
To that end I have several questions.
1 - What image type do I use? Like jpeg, bmp, gif, etc.
2 - How do I make parts of it transparent?
3 - How do I make it appear on the screen, given some coordinates on the JPanel?

To draw an image directly to a JPanel given certain coordinates, you have to create a custom JPanel and override its paintComponent() method. Like this:
class PaintPanel extends JPanel{
public void paintComponent(Graphics g){
super.paintComponent(g);
//painting code goes here}
}Java can load in and draw GIF and JPEG images. If you decide to use GIF files, any good image editor like Adobe Photoshop should be able to make them transparent for you before the fact. If you want to set transparency within your java program you will have to create a BufferedImage and make certain colors within it transparent, but I would like to know how to do that as much as you do.

Is it possible to add a jpeg and a layer on top

Hi,
I want to add a jpeg image as a background to an applet then i want to add a layer (perhaps a panel) on top of this to draw circles and lines using the Graphics2D class.
Is it possible to do this??
If so can you point me in the right direction please.
Many thanks

/* <applet code="AppletBackground" width="400" height="400"></applet>
* use: >appletviewer AppletDrawing.java
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class AppletBackground extends JApplet
    public void init()
        BackgroundPanel panel = new BackgroundPanel();
        setContentPane(panel);
        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(panel.getUIPanel(), "North");
    public static void main(String[] args)
        JApplet applet = new AppletBackground();
        JFrame f = new JFrame(applet.getClass().getName());
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(applet);
        f.setSize(400,400);
        f.setLocation(200,200);
        applet.init();
        applet.start();
        f.setVisible(true);
class BackgroundPanel extends JPanel
    BufferedImage image;
    boolean fill;
    public BackgroundPanel()
        loadImage();
        fill = true;
        setOpaque(true); // for safety (laf variant)
        setBackground(Color.white);
    protected void paintComponent(Graphics g)
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        int side = Math.min(w, h)/4;
        int imageW = image.getWidth();
        int imageH = image.getHeight();
        double xScale = (double)w/imageW;
        double yScale = (double)h/imageH;
        double scale;
        if(fill)
            scale = Math.max(xScale, yScale);
        else
            scale = Math.min(xScale, yScale);
        double x = (w - imageW * scale)/2;
        double y = (h - imageH * scale)/2;
        AffineTransform at = new AffineTransform();
        at.translate(x, y);
        at.scale(scale, scale);
        g2.drawRenderedImage(image, at);
        g2.setPaint(Color.red);
        g2.draw(new Rectangle2D.Double(w/2 - side/2, h/2 - side/2, side, side));
        g2.setPaint(new Color(200,240,240,100));
        g2.fill(new Ellipse2D.Double(w/2 - w*3/8, h/2 - h*3/8, w*3/4, h*3/4));
        g2.setPaint(new Color(180,0,180,40));
        g2.fill(new Ellipse2D.Double(w/2 - w*13/128, h/2 - h*13/128, w*13/64, h*13/64));
    public JPanel getUIPanel()
        final JCheckBox fillCheck = new JCheckBox("fill", true);
        fillCheck.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                fill = fillCheck.isSelected();
                repaint();
        JPanel panel = new JPanel();
        panel.setOpaque(false);
        panel.add(fillCheck);
        return panel;
    private void loadImage()
        String fileName = "images/timberwolf.jpg";
        try
            URL url = getClass().getResource(fileName);
            image = ImageIO.read(url);
        catch(MalformedURLException mue)
            System.out.println("Bad URL: " + mue.getMessage());
        catch(IOException ioe)
            System.out.println("Read trouble: " + ioe.getMessage());
}

Can We show the ppt slides in jpanel or other componant ?

Hello sir,
There is a problem with me, I want to display ppt slides into jpanel .Is it possible ? if it is possible than please give me ideas and send codes .

the cheapest way i can think of rite now is to convert the ppt to image and then display it .... use the buttons to get to the new ppt the same way.
if you really want to automate the process try reading this ...
http://www.oooforum.org/forum/viewtopic.phtml?t=8715&highlight=java+converting+ppt+image
it tells you the procedure to convert a ppt to jpeg ... if have a jpeg you can then display it as an image on JPanel.

JAVA Drawing Graphics Save as JPEG?

My problem is this, I am trying to save my g2 graphic image to a jpg. This is how I have things setup, I will show code and my thoughts. What I need is help to figure out how I could save seperate .java files graphics g to the jpg format from a JFileChooser in a different .java file.
HERE IS THE CODE FOR HOW GRAPH IS CREATED. graph.java
I have a graph I am drawing in a seperate .java file and it is created like this:
public class graph extends JPanel {
    public static Graphics2D g2;
    final int HPAD = 60, VPAD = 40;
    int[] data;
    Font font;
    public test() {
        data = new int[] {120, 190, 211, 75, 30, 290, 182, 65, 85, 120, 100, 101};
        font = new Font("lucida sans regular", Font.PLAIN, 8);
        setBackground(Color.white);
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        int w = getWidth();
        int h = getHeight();
        // scales
        float xInc = (w - HPAD - HPAD) / 10f;
        float yInc = (h - 2*VPAD) / 10f;
        int[] dataVals = getDataVals();
        float yScale = dataVals[2] / 10f;
//        etc... (the rest is just drawing...blah...blah)
}HERE IS THE CODE FOR HOW MY GRAPH IS DISPLAYED AND TRYING TO BE SAVED. results.java
The graph I created is then displayed in a JPanel and there is a button in the results window to save the graph results. This is where I am having difficulty as I am trying to save the g2 from graph.java (declared public static...not sure if this a good idea) but anyway I want to save this as a jpg heres the code:
        resultPanel = new JPanel(new PercentLayout());
        graph drawing = new graph();
        resultPanel.add (
            drawing,
            new PercentLayout.Constraint(1,41,49,50));
        resultPanel.add (
            saveButton1,
            new PercentLayout.Constraint(1,94,25,5));
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() == saveButton1) {
            doSaveGraph();
    public void doSaveGraph() {
        JFileChooser fileSaver;
        fileSaver = new JFileChooser(); // The file-opening dialog
        ExampleFileFilter filter = new ExampleFileFilter("jpg");
        filter.setDescription("JPEG Picture File");
        fileSaver.addChoosableFileFilter(filter);
        try {
            if(fileSaver.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
                File f = fileSaver.getSelectedFile();
                BufferedImage img = new BufferedImage(672,600, BufferedImage.TYPE_INT_RGB);
      // SOMEWHERE IN HERE IS WHERE I NEED TO GRAB G2? I AM NOT SURE WHAT TO DO HERE
                //Graphics g = img.getGraphics();
                //panel.paint(g);
                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f));
                JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
                JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(img);
                param.setQuality(1f, true);
                encoder.setJPEGEncodeParam(param);
                encoder.encode(img);
                System.out.println("It worked");
            else{}
        catch (Exception e) {
            e.printStackTrace();
...If you can help me I will be very happy, and give you 10 dukes! LOL and I appreciate the help!

import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class SavingGraphics
    public static void main(String[] args)
        GraphicsCreationPanel graphicsPanel = new GraphicsCreationPanel();
        GraphicsSaver saver = new GraphicsSaver(graphicsPanel);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(saver.getUIPanel(), "North");
        f.getContentPane().add(graphicsPanel);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
class GraphicsCreationPanel extends JPanel
    String text;
    Font font;
    public GraphicsCreationPanel()
        text = "hello world";
        font = new Font("lucida bright regular", Font.PLAIN, 36);
        setBackground(Color.white);
    protected void paintComponent(Graphics g)
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        int w = getWidth();
        int h = getHeight();
        g2.setPaint(Color.blue);
        g2.draw(new Rectangle2D.Double(w/16, h/16, w*7/8, h*7/8));
        g2.setPaint(Color.orange);
        g2.fill(new Ellipse2D.Double(w/12, h/12, w*5/6, h*5/6));
        g2.setPaint(Color.red);
        g2.fill(new Ellipse2D.Double(w/6, h/6, w*2/3, h*2/3));
        g2.setPaint(Color.black);
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        LineMetrics lm = font.getLineMetrics(text, frc);
        float textWidth = (float)font.getStringBounds(text, frc).getWidth();
        float x = (w - textWidth)/2;
        float y = (h + lm.getHeight())/2 - lm.getDescent();
        g2.drawString(text, x, y);
class GraphicsSaver
    GraphicsCreationPanel graphicsPanel;
    JFileChooser fileChooser;
    public GraphicsSaver(GraphicsCreationPanel gcp)
        graphicsPanel = gcp;
        fileChooser = new JFileChooser(".");
    private void save()
        if(fileChooser.showSaveDialog(null) == JFileChooser.APPROVE_OPTION)
            File file = fileChooser.getSelectedFile();
            String ext = file.getPath().substring(file.getPath().indexOf(".") + 1);
            BufferedImage image = getImage();
            try
                ImageIO.write(image, ext, file);
            catch(IOException ioe)
                System.out.println("write: " + ioe.getMessage());
    private BufferedImage getImage()
        int w = graphicsPanel.getWidth();
        int h = graphicsPanel.getHeight();
        BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2 = bi.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        graphicsPanel.paint(g2);
        g2.dispose();
        return bi;
    public JPanel getUIPanel()
        JButton save = new JButton("save");
        save.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent e)
                save();
        JPanel panel = new JPanel();
        panel.add(save);
        return panel;
}

Exporting from a 2D line graph with .jpeg extension

Is there any way to export from an ordinary 2D line graph with .jpeg extension so that with using this image i will improve my result of exporting excel.
e.g. i have found and example and added a button as you will see when you run this code.I will click this button and it will export this line graph with extension .jpeg so that i will see it as an ordinary image at my home directory.
Thanks for any helpful comment
Regars,
Serhat
* To change this template, choose Tools | Templates
* and open the template in the editor.
* @author led1433
import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;
public class LineGraph
    public static void main(String[] args)
        int x1 = 1000,y1 = 0;
        JFrame f = new JFrame();
        JButton exportToJPegButton = new JButton("EXPORT WITH JPEG");
        exportToJPegButton.setToolTipText("Exports Graph with extension *jpeg");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        exportToJPegButton.setSize(200,25);
        f.add(exportToJPegButton).setLocation(x1, y1);
        f.getContentPane().add(new GraphPanel());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
class GraphPanel extends JPanel
    final int
        HPAD = 60,
        VPAD = 40;
    int[] data;
    Font font;
    public GraphPanel()
        data = new int[] {
            120, 190, 211, 75, 30, 290, 182, 65, 85, 120, 100, 101
        font = new Font("lucida sans regular", Font.PLAIN, 16);
        setBackground(Color.white);
    protected void paintComponent(Graphics g)
        super.paintComponent(g);
        Graphics2D g2 = (Graphics2D)g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setFont(font);
        FontRenderContext frc = g2.getFontRenderContext();
        int w = getWidth();
        int h = getHeight();
        // scales
        float xInc = (w - HPAD - VPAD) / 11f;
        float yInc = (h - 2*VPAD) / 10f;
        int[] dataVals = getDataVals();
        float yScale = dataVals[2] / 10f;
        // ordinate
        g2.draw(new Line2D.Double(HPAD, VPAD, HPAD, h - VPAD));
        // tic marks
        float x1 = HPAD, y1 = VPAD, x2 = HPAD - 3, y2;
        for(int j = 0; j < 10; j++)
            g2.draw(new Line2D.Double(x1, y1, x2, y1));
            y1 += yInc;
        // labels
        String text; LineMetrics lm;
        float xs, ys, textWidth, height;
        for(int j = 0; j <= 10; j++)
            text = String.valueOf(dataVals[1] - (int)(j * yScale));
            textWidth = (float)font.getStringBounds(text, frc).getWidth();
            lm = font.getLineMetrics(text, frc);
            height = lm.getAscent();
            xs = HPAD - textWidth - 7;
            ys = VPAD + (j * yInc) + height/2;
            g2.drawString(text, xs, ys);
        // abcissa
        g2.draw(new Line2D.Double(HPAD, h - VPAD, w - VPAD, h - VPAD));
        // tic marks
        x1 = HPAD; y1 = h - VPAD; y2 = y1 + 3;
        for(int j = 0; j < 12; j++)
            g2.draw(new Line2D.Double(x1, y1, x1, y2));
            x1 += xInc;
        // labels
        ys = h - VPAD;
        for(int j = 0; j < 12; j++)
            text = String.valueOf(j + 1);
            textWidth = (float)font.getStringBounds(text, frc).getWidth();
            lm = font.getLineMetrics(text, frc);
            height = lm.getHeight();
            xs = HPAD + j * xInc - textWidth/2;
            g2.drawString(text, xs, ys + height);
        // plot data
        x1 = HPAD;
        yScale = (float)(h - 2*VPAD) / dataVals[2];
        for(int j = 0; j < data.length; j++)
            y1 = VPAD + (h - 2*VPAD) - (data[j] - dataVals[0]) * yScale;
            if(j > 0)
                g2.draw(new Line2D.Double(x1, y1, x2, y2));
            x2 = x1;
            y2 = y1;
            x1 += xInc;
    private int[] getDataVals()
        int max = Integer.MIN_VALUE;
        int min = Integer.MAX_VALUE;
        for(int j = 0; j < data.length; j++)
            if(data[j] < min)
                min = data[j];
            if(data[j] > max)
                max = data[j];
        int span = max - min;
        return new int[] { min, max, span };
}

GraphPanel stays the same.
public class JpegExport {
    public static void main(String[] args) {
        final GraphPanel graphPanel = new GraphPanel();
        JButton exportToJPegButton = new JButton("EXPORT WITH JPEG");
        exportToJPegButton.setToolTipText("Exports Graph with extension *jpeg");
        exportToJPegButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                exportToJpeg(graphPanel);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(exportToJPegButton, BorderLayout.NORTH);
        f.getContentPane().add(graphPanel, BorderLayout.CENTER);
        f.setSize(400, 400);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    private static void exportToJpeg(GraphPanel graphPanel) {
        try {
            int w = graphPanel.getWidth();
            int h = graphPanel.getHeight();
            BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            Graphics2D g2 = image.createGraphics();
            graphPanel.paint(g2);
            g2.dispose();
            ImageIO.write(image, "jpeg", new File("export.jpg"));
        } catch (IOException e) {
            e.printStackTrace();
}

Adding mouselisteners to JPanels created through for loop

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.io.File;
import java.io.IOException;
import java.util.Vector;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.SwingConstants;
import javax.swing.filechooser.FileSystemView;
public class ScrollableWrapTest {
    public static void main(String[] args) {
        try {
              ScrollableWrapTest st = new ScrollableWrapTest();
            final JPanel mainPanel = new JPanel(new WrapScollableLayout(FlowLayout.LEFT, 10, 10));
            mainPanel.setBackground(Color.WHITE);
            JScrollPane pane = new JScrollPane(mainPanel);
            pane.setPreferredSize(new Dimension(550, 300));
            Vector v = new Vector();
            v.add("first.doc");
            v.add("second.txt");
            v.add("third.pdf");
            v.add("fourth.rar");
            v.add("fifth.zip");
            v.add("sixth.folder");
            v.add("seventh.exe");
            v.add("eighth.bmp");
            v.add("nineth.jpeg");
            v.add("tenth.wav");
            JButton button = null;
            for(int i =0;i<v.size();i++){
                JPanel panel = new JPanel(new BorderLayout());
                Icon icon = st.getIcone(st.getExtension(v.elementAt(i).toString().toUpperCase()));
                  panel.setBackground(Color.WHITE);
                 Action action = new AbstractAction("", icon) {
                     public void actionPerformed(ActionEvent evt) {
                 button = new JButton(action);
                 button.setPreferredSize(new Dimension(icon.getIconWidth(), icon.getIconHeight()));
                 JPanel buttonPanel = new JPanel();
                 buttonPanel.setBackground(Color.WHITE);
                 buttonPanel.add(button);
                 JLabel label = new JLabel((String)v.elementAt(i));
                 label.setHorizontalAlignment(SwingConstants.CENTER);
                 panel.add(buttonPanel , BorderLayout.NORTH);
                 panel.add(label, BorderLayout.SOUTH);
                 mainPanel.add(panel);
                mainPanel.revalidate();
            st.buildGUI(pane);
        } catch (Exception e) {e.printStackTrace();}
    public void buildGUI(JScrollPane scrollPane)
         JFrame frame = new JFrame("Scrollable Wrap Test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(scrollPane, BorderLayout.CENTER);
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setVisible(true);
    public String getExtension(String name)
          if(name.lastIndexOf(".")!=-1)
               String extensionPossible = name.substring(name.lastIndexOf(".")+1, name.length());
               if(extensionPossible.length()>5)
                    return "";
               else
                    return extensionPossible;
          else return "";
     public Icon getIcone(String extension)
          //we create a temporary file on the local file system with the specified extension
          File file;
          String cheminIcone = "";
          if(((System.getProperties().get("os.name").toString()).startsWith("Mac")))
               cheminIcone = System.getProperties().getProperty("file.separator");
          else if(((System.getProperties().get("os.name").toString()).startsWith("Linux")))
               //cheminIcone = FileSystemView.getFileSystemView().getHomeDirectory().getAbsolutePath()+
               cheminIcone = "/"+"tmp"+"/BoooDrive-"+System.getProperty("user.name")+"/";
          else cheminIcone = System.getenv("TEMP") + System.getProperties().getProperty("file.separator");
          File repIcone = new File(cheminIcone);
          if(!repIcone.exists()) repIcone.mkdirs();
          try
               if(extension.equals("FOLDER"))
                    file = new File(cheminIcone + "icon");
                    file.mkdir();
               else
                    file = new File(cheminIcone + "icon." + extension.toLowerCase());
                    file.createNewFile();
               //then we get the SystemIcon for this temporary File
               Icon icone = FileSystemView.getFileSystemView().getSystemIcon(file);
               //then we delete the temporary file
               file.delete();
               return icone;
          catch (IOException e){ }
          return null;
    private static class WrapScollableLayout extends FlowLayout {
        public WrapScollableLayout(int align, int hgap, int vgap) {
            super(align, hgap, vgap);
        public Dimension preferredLayoutSize(Container target) {
            synchronized (target.getTreeLock()) {
                Dimension dim = super.preferredLayoutSize(target);
                layoutContainer(target);
                int nmembers = target.getComponentCount();
                for (int i = 0 ; i < nmembers ; i++) {
                    Component m = target.getComponent(i);
                    if (m.isVisible()) {
                        Dimension d = m.getPreferredSize();
                        dim.height = Math.max(dim.height, d.height + m.getY());
                if (target.getParent() instanceof JViewport)
                    dim.width = ((JViewport) target.getParent()).getExtentSize().width;
                Insets insets = target.getInsets();
                dim.height += insets.top + insets.bottom + getVgap();
                return dim;
}How can I add mouse listener to each of the 'panel' in 'mainpanel' created inside the 'for loop' using the code mainPanel.add(panel);Rony

>
How can I add mouse listener to each of the 'panel' in 'mainpanel' created inside the 'for loop' using the code mainPanel.add(panel);
Change the first part of the code like this..
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.IOException;
import java.util.Vector;
import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JViewport;
import javax.swing.SwingConstants;
import javax.swing.filechooser.FileSystemView;
public class ScrollableWrapTest {
    public static void main(String[] args) {
        try {
              ScrollableWrapTest st = new ScrollableWrapTest();
            final JPanel mainPanel = new JPanel(new WrapScollableLayout(FlowLayout.LEFT, 10, 10));
            mainPanel.setBackground(Color.WHITE);
            JScrollPane pane = new JScrollPane(mainPanel);
            pane.setPreferredSize(new Dimension(550, 300));
            Vector<String> v = new Vector<String>();
            v.add("first.doc");
            v.add("second.txt");
            v.add("third.pdf");
            v.add("fourth.rar");
            v.add("fifth.zip");
            v.add("sixth.folder");
            v.add("seventh.exe");
            v.add("eighth.bmp");
            v.add("nineth.jpeg");
            v.add("tenth.wav");
            JButton button = null;
            MouseListener ml = new MouseAdapter() {
                    @Override
                    public void mouseClicked(MouseEvent me) {
                         System.out.println(me);
            for(int i =0;i<v.size();i++){
                JPanel panel = new JPanel(new BorderLayout());
                Icon icon = st.getIcone(st.getExtension(v.elementAt(i).toString().toUpperCase()));
                  panel.setBackground(Color.WHITE);
                 Action action = new AbstractAction("", icon) {
                     public void actionPerformed(ActionEvent evt) {
                 button = new JButton(action);
                 button.setPreferredSize(new Dimension(icon.getIconWidth(), icon.getIconHeight()));
                 JPanel buttonPanel = new JPanel();
                 buttonPanel.setBackground(Color.WHITE);
                 buttonPanel.add(button);
                 JLabel label = new JLabel((String)v.elementAt(i));
                 label.setHorizontalAlignment(SwingConstants.CENTER);
                 panel.add(buttonPanel , BorderLayout.NORTH);
                 panel.add(label, BorderLayout.SOUTH);
                 mainPanel.add(panel);
                 panel.addMouseListener( ml );
                mainPanel.revalidate();
            st.buildGUI(pane);
        } catch (Exception e) {e.printStackTrace();}
...

Saving a JPanel as an image

Hi peeps,
I've written the following code after reading many threads about how to save a JPanel as an image. On the whole, it works. But the JPanel itself contains many different bits such as Line2D objects and other shapes, as well as ImageIcons. So when the JPanel is saved, the shape objects save ok but the icons do not get saved. Does anyone know a better solution please?
By the way: "area" is the var name for a JPanel and "toSave" is a File object in the code below...
BufferedImage image = new BufferedImage(maxHorizontal, maxVertical, BufferedImage.TYPE_INT_RGB);
Graphics2D g = image.createGraphics();
g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
area.paint(g);
g.dispose();
ImageIO.write(image, "jpeg", toSave);

A robot wouldn't do what the OP wanted: with antialiasing, etc...
I'm still not convinced that ImageIcons don't get saved. Why does this code work:
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;
public class X {
    public static void main(String[] args) throws IOException {
        final JPanel p = new JPanel();
        p.add(new JLabel(new ImageIcon(new URL("http://today.java.net/jag/bio/JagHeadshot-small.jpg"))));
        p.add(new JLabel(new ImageIcon(new URL("http://java.sun.com/placeholders/duke_swinging.gif"))));
        p.add(new JLabel("etc"));
        JButton save = new JButton("save");
        save.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent evt) {
                save(p, new File("junk.jpeg"));
        JFrame f = new JFrame("X");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Container cp = f.getContentPane();
        cp.add(p);
        cp.add(save, BorderLayout.SOUTH);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    static void save(Component comp, File file) {
        try {
            BufferedImage image = new BufferedImage(comp.getWidth(), comp.getHeight(), BufferedImage.TYPE_INT_RGB);
            Graphics2D g = image.createGraphics();
            g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,RenderingHints.VALUE_FRACTIONALMETRICS_ON);
            g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
            comp.paint(g);
            g.dispose();
            ImageIO.write(image, "jpeg", file);
            image.flush();
        } catch (IOException e) {
            e.printStackTrace();
}

Jpeg in JPanel

Similar Messages

Maybe you are looking for