bH
2010-04-11 18:32:29 UTC
Correcting error of write Image to file
Hi All,
I want to correct an error of ImageIO.write(...
1 error found:
File: C:\Documents and
Settings\bH\Desktop\OpaqueToTransparent.java [line: 39]
Error: C:\Documents and Settings\bH\Desktop\OpaqueToTransparent.
java:39: cannot find symbol
symbol : method write(java.awt.Image,java.lang.String,java.
io.File)
location: class javax.imageio.ImageIO
TIA
bH
//from http://www.rgagnon.com/javadetails/java-0265.html
//from http://www.exampledepot.com/egs/javax.imageio/
import java.awt.Image;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.io.IOException;
import java.io.File;
import javax.imageio.ImageIO;
public class OpaqueToTransparent extends JFrame {
Image GifOrigWithBlueBackgrnd;
Image GifModifWithTransparentBackgrnd;
OpaqueToTransparent() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
setVisible(true);
}
public void init() {
try {
// Read from a file
File file = new File("images/cosmob.gif");
GifOrigWithBlueBackgrnd = ImageIO.read(file);
GifModifWithTransparentBackgrnd =
Transparency.makeColorTransparent
(GifOrigWithBlueBackgrnd, new Color(0).blue);
} catch (IOException e) {}
//try {
File file = new File("images/cosmobX.gif");
//error on the next line
ImageIO.write(GifModifWithTransparentBackgrnd,
"gif", file);
}
catch (IOException e) {}
// Use a label to display the image
JFrame frame = new JFrame();
JLabel label1 = new JLabel(new
ImageIcon(GifOrigWithBlueBackgrnd));
JLabel label2 = new JLabel(new
ImageIcon(GifModifWithTransparentBackgrnd));
frame.getContentPane().add(label1, BorderLayout.CENTER);
frame.getContentPane().add(label2, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new OpaqueToTransparent();
}
});
}
}
import java.awt.*;
import java.awt.image.*;
public class Transparency {
public static Image makeColorTransparent
(Image im, final Color color) {
ImageFilter filter = new RGBImageFilter() {
// the color we are looking for...
// Alpha bits are set to opaque
public int markerRGB = color.getRGB() | 0xFF000000;
public final int filterRGB(int x, int y, int rgb) {
if ( ( rgb | 0xFF000000 ) == markerRGB ) {
// Mark the alpha bits as zero - transparent
return 0x00FFFFFF & rgb;
}
else {
// nothing to do
return rgb;
}
}
};
ImageProducer ip = new FilteredImageSource(im.getSource(),
filter);
return Toolkit.getDefaultToolkit().createImage(ip);
}
}
Hi All,
I want to correct an error of ImageIO.write(...
1 error found:
File: C:\Documents and
Settings\bH\Desktop\OpaqueToTransparent.java [line: 39]
Error: C:\Documents and Settings\bH\Desktop\OpaqueToTransparent.
java:39: cannot find symbol
symbol : method write(java.awt.Image,java.lang.String,java.
io.File)
location: class javax.imageio.ImageIO
TIA
bH
//from http://www.rgagnon.com/javadetails/java-0265.html
//from http://www.exampledepot.com/egs/javax.imageio/
import java.awt.Image;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.io.IOException;
import java.io.File;
import javax.imageio.ImageIO;
public class OpaqueToTransparent extends JFrame {
Image GifOrigWithBlueBackgrnd;
Image GifModifWithTransparentBackgrnd;
OpaqueToTransparent() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
init();
setVisible(true);
}
public void init() {
try {
// Read from a file
File file = new File("images/cosmob.gif");
GifOrigWithBlueBackgrnd = ImageIO.read(file);
GifModifWithTransparentBackgrnd =
Transparency.makeColorTransparent
(GifOrigWithBlueBackgrnd, new Color(0).blue);
} catch (IOException e) {}
//try {
File file = new File("images/cosmobX.gif");
//error on the next line
ImageIO.write(GifModifWithTransparentBackgrnd,
"gif", file);
}
catch (IOException e) {}
// Use a label to display the image
JFrame frame = new JFrame();
JLabel label1 = new JLabel(new
ImageIcon(GifOrigWithBlueBackgrnd));
JLabel label2 = new JLabel(new
ImageIcon(GifModifWithTransparentBackgrnd));
frame.getContentPane().add(label1, BorderLayout.CENTER);
frame.getContentPane().add(label2, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new OpaqueToTransparent();
}
});
}
}
import java.awt.*;
import java.awt.image.*;
public class Transparency {
public static Image makeColorTransparent
(Image im, final Color color) {
ImageFilter filter = new RGBImageFilter() {
// the color we are looking for...
// Alpha bits are set to opaque
public int markerRGB = color.getRGB() | 0xFF000000;
public final int filterRGB(int x, int y, int rgb) {
if ( ( rgb | 0xFF000000 ) == markerRGB ) {
// Mark the alpha bits as zero - transparent
return 0x00FFFFFF & rgb;
}
else {
// nothing to do
return rgb;
}
}
};
ImageProducer ip = new FilteredImageSource(im.getSource(),
filter);
return Toolkit.getDefaultToolkit().createImage(ip);
}
}