// For complete examples and data files, please go to https://github.com/aspose-slides/Aspose.Cells-for-Cloud
try {
    // Instantiate Aspose Storage API SDK
    StorageApi storageApi = new StorageApi(Configuration.apiKey, Configuration.appSID, true);
    // Instantiate Aspose Words API SDK
    CellsApi cellsApi = new CellsApi(Configuration.apiKey, Configuration.appSID, true);
    Path inputFile = Utils.getPath(ConvertChartToImage.class, "Sample.xlsx");
    Path outputFile = Utils.getPath(ConvertChartToImage.class, "Chart.png");
    storageApi.PutCreate(inputFile.getFileName().toString(), null, Utils.STORAGE, inputFile.toFile());
    ResponseMessage cr = cellsApi.GetWorksheetChartWithFormat(inputFile.getFileName().toString(), "Sheet1", 0,
            "png", Utils.STORAGE, Utils.FOLDER);
    Files.copy(cr.getInputStream(), outputFile, StandardCopyOption.REPLACE_EXISTING);
}
catch (Exception e) {
    e.printStackTrace();
}