// Load the document into Aspose.Note.
String dataDir = Utils.getSharedDataDir(ConvertSpecificPageToPngImage.class) + "load/";
Document oneFile = new Document(dataDir + "Sample1.one", new LoadOptions());

// Initialize ImageSaveOptions object
ImageSaveOptions opts = new ImageSaveOptions(SaveFormat.Png);
// set page index
opts.setPageIndex(0);

// Save the document as PNG.
oneFile.save(dataDir + "ConvertSpecificPageToPngImage_out.png", opts);