public void setPartNumber(Integer partNumber) {
        this.partNumber = partNumber;
    }
<p>
Sets the optional part number that indicates the part to be downloaded in a multipart object.
</p>
<p>
The valid range for part number is 1 - 10000 inclusive.
Part numbers are 1 based. If an object has 1 part, partNumber=1 would be the correct not 0.
For partNumber < 1, an AmazonS3Exception is thrown with response code 400 bad request.
For partNumber larger than actual part count,  an AmazonS3Exception is thrown with response code 416 Request Range Not Satisfiable.
</p>

@param partNumber
           The part number representing a part in a multipart object.

@see GetObjectRequest#getPartNumber()
@see GetObjectRequest#withPartNumber(Integer)
aws-java-sdk-s3/src/main/java/com/amazonaws/services/s3/model/GetObjectRequest.java