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public static void main(String args[]) {
String path = "Z:/1.jpg";
File f = new File(path);
try {
ImageInputStream iis = ImageIO.createImageInputStream(f);
Iterator<ImageReader> it = ImageIO.getImageReadersByFormatName("jpg");
ImageReader ir = (ImageReader) it.next();
ir.setInput(iis);
System.out.println("getWidth : "+ir.getWidth(0));
System.out.println("getHeight : "+ir.getHeight(0));
System.out.println("getFormatName : "+ir.getFormatName());
} catch (Exception ex) {
ex.printStackTrace();
}
}