java - 将 getSampleModel 转换为 SinglePixelPackedSampleModel

Question

我想在java中执行这段代码，但我遇到了这个错误:

Exception in thread "main" java.lang.ClassCastException: java.awt.image.PixelInterleavedSampleModel cannot be cast to java.awt.image.SinglePixelPackedSampleModel

谁能帮我吗？

源代码是:

    BufferedImage cat = ImageIO.read(new File("E:\\11.jpg"));
    WritableRaster img=cat.getRaster();
    final SinglePixelPackedSampleModel sppsm;
    sppsm = (SinglePixelPackedSampleModel) img.getSampleModel();
    final int scan = sppsm.getScanlineStride();

Answer 1

img.getSampleModel() 返回一个 java.awt.image.PixelInterleavedSampleModel 而不是 SinglePixelPackedSampleModel。所以你必须更改你的代码:

BufferedImage cat = ImageIO.read(new File("E:\\11.jpg"));
WritableRaster img=cat.getRaster();
final PixelInterleavedSampleModel sppsm;
sppsm = (PixelInterleavedSampleModel) img.getSampleModel();
final int scan = sppsm.getScanlineStride();