Java Code Examples for javax.imageio.ImageIO#getWriterFormatNames()

@Test
public void testname() throws Exception {
	System.out.println(Arrays.asList(ImageIO.getReaderMIMETypes()));
	System.out.println(Arrays.asList(ImageIO.getWriterFormatNames()));
	System.out.println(Arrays.asList(ImageIO.getReaderFormatNames()));

	URL pngFile = getClass().getResource("/test.png");
	BufferedImage img = ImageIO.read(pngFile);

	for (String type : ImageIO.getWriterFormatNames()) {
		if (type.equalsIgnoreCase("jpg") || type.equalsIgnoreCase("jpeg")) {
			// Avoid issue #6 on OpenJDK8/Debian 
			continue;
		}
		
		File f = File.createTempFile("imageio-test", "." + type);
		ImageIO.write(img, type, f);
		System.out.println(f);
		ImageIO.read(f);
	}
}
 

/**
 * Method to get the list of supported file extensions for writing
 *
 * @return List of supported file extensions for writing
 * @throws OpenStegoException
 */
@Override
public List<String> getWritableFileExtensions() throws OpenStegoException {
    if (writeFormats != null) {
        return writeFormats;
    }

    String format = null;
    String[] formats = null;
    List<String> formatList = new ArrayList<String>();

    formats = ImageIO.getWriterFormatNames();
    for (int i = 0; i < formats.length; i++) {
        format = formats[i].toLowerCase();
        if (format.indexOf("jpeg") >= 0 && format.indexOf("2000") >= 0) {
            format = "jp2";
        }
        if (!formatList.contains(format)) {
            formatList.add(format);
        }
    }

    Collections.sort(formatList);
    writeFormats = formatList;
    return writeFormats;
}
 

/**
 * Method to get the list of supported file extensions for writing
 *
 * @return List of supported file extensions for writing
 * @throws OpenStegoException
 */
@Override
public List<String> getWritableFileExtensions() throws OpenStegoException {
    if (writeFormats != null) {
        return writeFormats;
    }

    String format = null;
    String[] formats = null;
    writeFormats = new ArrayList<String>();

    formats = ImageIO.getWriterFormatNames();
    for (int i = 0; i < formats.length; i++) {
        format = formats[i].toLowerCase();
        if (format.indexOf("jpeg") >= 0 && format.indexOf("2000") >= 0) {
            format = "jp2";
        }
        if (!writeFormats.contains(format)) {
            writeFormats.add(format);
        }
    }

    Collections.sort(writeFormats);
    return writeFormats;
}
 

/**
 * Method to get the list of supported file extensions for writing
 *
 * @return List of supported file extensions for writing
 * @throws OpenStegoException
 */
@Override
public List<String> getWritableFileExtensions() throws OpenStegoException {
    if (writeFormats != null) {
        return writeFormats;
    }

    String format = null;
    String[] formats = null;
    writeFormats = new ArrayList<String>();

    formats = ImageIO.getWriterFormatNames();
    for (int i = 0; i < formats.length; i++) {
        format = formats[i].toLowerCase();
        if (format.indexOf("jpeg") >= 0 && format.indexOf("2000") >= 0) {
            format = "jp2";
        }
        if (!writeFormats.contains(format)) {
            writeFormats.add(format);
        }
    }

    Collections.sort(writeFormats);
    return writeFormats;
}
 

/**
 * Returns a {@link List} of supported output formats.
 * 
 * @return		A {@link List} of supported output formats. If no formats
 * 				are supported, an empty list is returned.
 */
public static List<String> getSupportedOutputFormats()
{
	String[] formats = ImageIO.getWriterFormatNames();
	
	if (formats == null)
	{
		return Collections.emptyList();
	}
	else
	{
		return Arrays.asList(formats);
	}
}
 

private static void testGetWriterFormatNames() {
    String[] names = ImageIO.getWriterFormatNames();
    for (String n : names) {
        Iterator<ImageWriter> it = ImageIO.getImageWritersByFormatName(n);
        if (!it.hasNext()) {
            throw new RuntimeException("getWriterFormatNames returned " +
                                       "an unknown name: " + n);
        }
    }
}
 

synchronized private static String getFormatName(String filename) throws IOException {
	String ext = filename.substring(filename.lastIndexOf(".") + 1);
	String[] arr = ImageIO.getWriterFormatNames();
	for (int i = 0; i < arr.length; i++) {
		if (arr[i].equals(ext))
			return ext;
	}
	throw new IOException("file [" + filename + "] has a format not supported [" + ext + "]");
}
 

private static void testGetWriterFormatNames() {
    String[] names = ImageIO.getWriterFormatNames();
    for (String n : names) {
        Iterator<ImageWriter> it = ImageIO.getImageWritersByFormatName(n);
        if (!it.hasNext()) {
            throw new RuntimeException("getWriterFormatNames returned " +
                                       "an unknown name: " + n);
        }
    }
}
 

public FilePreview() {
    super(1, 0, 1);

    for (String s : ImageIO.getWriterFormatNames()) {
        knownTypes.put(s.toLowerCase(), FileType.IMAGE);
    }

    initUI();
}
 

public FilePreview() {
    super(1, 0, 1);

    for (String s : ImageIO.getWriterFormatNames()) {
        knownTypes.put(s.toLowerCase(), FileType.IMAGE);
    }

    initUI();
}
 

public FilePreview() {
    super(1, 0, 1);

    for (String s : ImageIO.getWriterFormatNames()) {
        knownTypes.put(s.toLowerCase(), FileType.IMAGE);
    }

    initUI();
}
 

private void initUI() {
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames()));

    final FilePreview filePreview = new FilePreview();

    externalChooser.setAccessory(filePreview);
    externalChooser.addPropertyChangeListener(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY,
            new PropertyChangeListener() {
                public void propertyChange(PropertyChangeEvent evt) {
                    filePreview.loadFileInfo(externalChooser.getSelectedFile());
                }
            });

    embeddedChooser.setControlButtonsAreShown(false);

    embeddedChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));

    FileNameExtensionFilter filter = new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames());

    embeddedChooser.addChoosableFileFilter(filter);
    embeddedChooser.setFileFilter(filter);

    for (int i = MIN_FILTER_ID; i <= MAX_FILTER_ID; i++) {
        cbFilters.addItem(new FilterItem(i, resourceManager.getString(FILTER_NAMES[i])));
    }

    JGridPanel pnFilter = new JGridPanel(2, 0);

    pnFilter.cell(cbFilters).
            cell(btnApplyFilter);

    JGridPanel pnRotateButtons = new JGridPanel(4, 3);

    pnRotateButtons.cell(btnRotateLeft).
            cell(btnRotateRight).
            cell(btnFlipHorizontal).
            cell(btnFlipVertical);

    JGridPanel pnBottom = new JGridPanel(4, 1);

    pnBottom.setHGap(JGridPanel.DEFAULT_GAP * 4);

    pnBottom.cell(btnSelect, JGridPanel.Layout.FILL).
            cell().
            cell(pnFilter).
            cell(btnSave, JGridPanel.Layout.FILL).
            cell(btnSelectWithPreview, JGridPanel.Layout.FILL).
            cell().
            cell(pnRotateButtons).
            cell(btnCancel, JGridPanel.Layout.FILL);

    pnContent.cell(pnImage);
    pnContent.cell(pnBottom, new Insets(10, 10, 10, 10));

    add(pnContent);

    setState(State.EMPTY, false);
}
 

private void initUI() {
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames()));

    final FilePreview filePreview = new FilePreview();

    externalChooser.setAccessory(filePreview);
    externalChooser.addPropertyChangeListener(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY,
            new PropertyChangeListener() {
                public void propertyChange(PropertyChangeEvent evt) {
                    filePreview.loadFileInfo(externalChooser.getSelectedFile());
                }
            });

    embeddedChooser.setControlButtonsAreShown(false);

    embeddedChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));

    FileNameExtensionFilter filter = new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames());

    embeddedChooser.addChoosableFileFilter(filter);
    embeddedChooser.setFileFilter(filter);

    for (int i = MIN_FILTER_ID; i <= MAX_FILTER_ID; i++) {
        cbFilters.addItem(new FilterItem(i, resourceManager.getString(FILTER_NAMES[i])));
    }

    JGridPanel pnFilter = new JGridPanel(2, 0);

    pnFilter.cell(cbFilters).
            cell(btnApplyFilter);

    JGridPanel pnRotateButtons = new JGridPanel(4, 3);

    pnRotateButtons.cell(btnRotateLeft).
            cell(btnRotateRight).
            cell(btnFlipHorizontal).
            cell(btnFlipVertical);

    JGridPanel pnBottom = new JGridPanel(4, 1);

    pnBottom.setHGap(JGridPanel.DEFAULT_GAP * 4);

    pnBottom.cell(btnSelect, JGridPanel.Layout.FILL).
            cell().
            cell(pnFilter).
            cell(btnSave, JGridPanel.Layout.FILL).
            cell(btnSelectWithPreview, JGridPanel.Layout.FILL).
            cell().
            cell(pnRotateButtons).
            cell(btnCancel, JGridPanel.Layout.FILL);

    pnContent.cell(pnImage);
    pnContent.cell(pnBottom, new Insets(10, 10, 10, 10));

    add(pnContent);

    setState(State.EMPTY, false);
}
 

/**
 * List available image formats.
 * see http://examples.javacodegeeks.com/desktop-java/imageio/list-read-write-supported-image-formats/
 */
@Test
public void testListSupportedImageFormats() throws Exception {

    Set<String> set = new HashSet<String>();

    // Get list of all informal format names understood by the current set of registered readers
    String[] formatNames = ImageIO.getReaderFormatNames();

    for (int i = 0; i < formatNames.length; i++) {
        set.add(formatNames[i].toLowerCase());
    }
    System.out.println("Supported read formats: " + set);

    set.clear();

    // Get list of all informal format names understood by the current set of registered writers
    formatNames = ImageIO.getWriterFormatNames();

    for (int i = 0; i < formatNames.length; i++) {
        set.add(formatNames[i].toLowerCase());
    }
    System.out.println("Supported write formats: " + set);

    set.clear();

    // Get list of all MIME types understood by the current set of registered readers
    formatNames = ImageIO.getReaderMIMETypes();

    for (int i = 0; i < formatNames.length; i++) {
        set.add(formatNames[i].toLowerCase());
    }
    System.out.println("Supported read MIME types: " + set);

    set.clear();

    // Get list of all MIME types understood by the current set of registered writers
    formatNames = ImageIO.getWriterMIMETypes();

    for (int i = 0; i < formatNames.length; i++) {
        set.add(formatNames[i].toLowerCase());
    }
    System.out.println("Supported write MIME types: " + set);
}
 

private void initUI() {
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));
    externalChooser.addChoosableFileFilter(new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames()));

    final FilePreview filePreview = new FilePreview();

    externalChooser.setAccessory(filePreview);
    externalChooser.addPropertyChangeListener(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY,
            new PropertyChangeListener() {
                public void propertyChange(PropertyChangeEvent evt) {
                    filePreview.loadFileInfo(externalChooser.getSelectedFile());
                }
            });

    embeddedChooser.setControlButtonsAreShown(false);

    embeddedChooser.addChoosableFileFilter(new FileNameExtensionFilter("JPEG images", "jpg"));

    FileNameExtensionFilter filter = new FileNameExtensionFilter("All supported images",
            ImageIO.getWriterFormatNames());

    embeddedChooser.addChoosableFileFilter(filter);
    embeddedChooser.setFileFilter(filter);

    for (int i = MIN_FILTER_ID; i <= MAX_FILTER_ID; i++) {
        cbFilters.addItem(new FilterItem(i, resourceManager.getString(FILTER_NAMES[i])));
    }

    JGridPanel pnFilter = new JGridPanel(2, 0);

    pnFilter.cell(cbFilters).
            cell(btnApplyFilter);

    JGridPanel pnRotateButtons = new JGridPanel(4, 3);

    pnRotateButtons.cell(btnRotateLeft).
            cell(btnRotateRight).
            cell(btnFlipHorizontal).
            cell(btnFlipVertical);

    JGridPanel pnBottom = new JGridPanel(4, 1);

    pnBottom.setHGap(JGridPanel.DEFAULT_GAP * 4);

    pnBottom.cell(btnSelect, JGridPanel.Layout.FILL).
            cell().
            cell(pnFilter).
            cell(btnSave, JGridPanel.Layout.FILL).
            cell(btnSelectWithPreview, JGridPanel.Layout.FILL).
            cell().
            cell(pnRotateButtons).
            cell(btnCancel, JGridPanel.Layout.FILL);

    pnContent.cell(pnImage);
    pnContent.cell(pnBottom, new Insets(10, 10, 10, 10));

    add(pnContent);

    setState(State.EMPTY, false);
}