curl -X OPTIONS https://upload.box.com/api/2.0/files/content \
     -H 'Authorization: Bearer <ACCESS_TOKEN>" '
     -H "Content-Type: multipart/form-data" \
     -F attributes='{"name":"Photo.jpg", "parent":{"id":"11446498"}}'

String fileName = "My Doc.pdf";
BoxFolder rootFolder = BoxFolder.getRootFolder(api);
try {
    folder.canUpload(fileName, 98734576);

    // If the file upload would not have succeeded, it will not be attempted
    folder.uploadFile(fileContents, fileName);
} catch (BoxAPIException ex) (

)

// Verify that uploading a 200MB file named "Preso.ppt" to folder 12345 would succeed
client.files.preflightUploadFile(
		'12345',
		{
			name: 'Preso.ppt',
			size: 200000000
		},
		null,
		callback
	);