用J2SE1.4新特性来获取图象资源
下面的这个例子示范怎样使用javax.imageio包来从一个文件、输入流或URL获取图象资源，同时也示范了如何来把Image显示到屏幕上.
javax.imageio包默认支持GIF,PNG和JPEG格式的图片，这个例子只能工作在J2SE1.4或以上版本
Image image = null;
try {
File file = new File("image.gif");
image = ImageIO.read(file);
InputStream is = new BufferedInputStream(
new FileInputStream("image.gif"));
image = ImageIO.read(is);
URL url = new URL("image = ImageIO.read(url);
} catch (IOException e) {
}
JFrame frame = new JFrame();
JLabel label = new JLabel(new ImageIcon(image));
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
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下面的这个例子示范怎样使用javax.imageio包来从一个文件、输入流或URL获取图象资源，同时也示范了如何来把Image显示到屏幕上.
javax.imageio包默认支持GIF,PNG和JPEG格式的图片，这个例子只能工作在J2SE1.4或以上版本
Image image = null;
try {
File file = new File("image.gif");
image = ImageIO.read(file);
InputStream is = new BufferedInputStream(
new FileInputStream("image.gif"));
image = ImageIO.read(is);
URL url = new URL("image = ImageIO.read(url);
} catch (IOException e) {
}
JFrame frame = new JFrame();
JLabel label = new JLabel(new ImageIcon(image));
frame.getContentPane().add(label, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
包javax.imageio默认可以读和写一个GIF,PNG和JPEG图片，你可以调用ImageIO.getReaderFormatNames() 和ImageIO.getWriterFormatNames()来列出全部可读和可写的图片格式
String[] formatNames = ImageIO.getReaderFormatNames();
formatNames = unique(formatNames);
formatNames = ImageIO.getWriterFormatNames();
formatNames = unique(formatNames);
// png jpeg jpg
formatNames = ImageIO.getReaderMIMETypes();
formatNames = unique(formatNames);
// image/jpeg image/png image/x-png image/gif
formatNames = ImageIO.getWriterMIMETypes();
formatNames = unique(formatNames);
// image/jpeg image/png image/x-png
public static String[] unique(String[] strings) {
Set set = new HashSet();
for (int i=0; I
String name = strings[i].toLowerCase();
set.add(name);
}
return (String[])set.toArray(new String[0]);
}
![image = ImageIO.read(url);} catch (IOException e) {}JFrame frame = new JFrame();JLabel label = new JLabel(new ImageIcon(image));frame.getContentPane().add(label, BorderLayout.CENTER);frame.pack();frame.setVisible(true); 包javax.imageio默认可以读和写一个GIF,PNG和JPEG图片，你可以调用ImageIO.getReaderFormatNames() 和ImageIO.getWriterFormatNames()来列出全部可读和可写的图片格式String[] formatNames = ImageIO.getReaderFormatNames();formatNames = unique(formatNames);formatNames = ImageIO.getWriterFormatNames();formatNames = unique(formatNames);// png jpeg jpgformatNames = ImageIO.getReaderMIMETypes();formatNames = unique(formatNames);// image/jpeg image/png image/x-png image/gifformatNames = ImageIO.getWriterMIMETypes();formatNames = unique(formatNames);// image/jpeg image/png image/x-pngpublic static String[] unique(String[] strings) {Set set = new HashSet();for (int i=0; IString name = strings[i].toLowerCase();set.add(name);}return (String[])set.toArray(new String[0]);}](../../../Article/UploadFiles/2005118192914734.gif</A>){kind=link}