JPEGImageWriter.java 文件源码

public int getNumThumbnailsSupported(ImageTypeSpecifier imageType,
                                     ImageWriteParam param,
                                     IIOMetadata streamMetadata,
                                     IIOMetadata imageMetadata) {
    if (jfifOK(imageType, param, streamMetadata, imageMetadata)) {
        return Integer.MAX_VALUE;
    }
    return 0;
}