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ListObjects

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Pragya Keshap answered on April 24, 2022 Popularity 3/10 Helpfulness 1/10

answer ListObjects

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ListObjects

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https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListObjects.html

public class ListObjects {

    public static void main(String[] args) {

        final String usage = "\n" +
            "Usage:\n" +
            "    <bucketName> \n\n" +
            "Where:\n" +
            "    bucketName - The Amazon S3 bucket from which objects are read. \n\n" ;

        if (args.length != 1) {
            System.out.println(usage);
            System.exit(1);
        }

        String bucketName = args[0];
        ProfileCredentialsProvider credentialsProvider = ProfileCredentialsProvider.create();
        Region region = Region.US_EAST_1;
        S3Client s3 = S3Client.builder()
            .region(region)
            .credentialsProvider(credentialsProvider)
            .build();

        listBucketObjects(s3, bucketName);
        s3.close();
    }

    // snippet-start:[s3.java2.list_objects.main]
    public static void listBucketObjects(S3Client s3, String bucketName ) {

        try {
            ListObjectsRequest listObjects = ListObjectsRequest
                .builder()
                .bucket(bucketName)
                .build();

            ListObjectsResponse res = s3.listObjects(listObjects);
            List<S3Object> objects = res.contents();
            for (S3Object myValue : objects) {
                System.out.print("\n The name of the key is " + myValue.key());
                System.out.print("\n The object is " + calKb(myValue.size()) + " KBs");
                System.out.print("\n The owner is " + myValue.owner());
            }

        } catch (S3Exception e) {
            System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }

    //convert bytes to kbs.
    private static long calKb(Long val) {
        return val/1024;
    }
   // snippet-end:[s3.java2.list_objects.main]
}

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 13 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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# Python3 code here for creating class
class geeks:
	def __init__(self, x, y):
		self.x = x
		self.y = y
		
	def Sum(self):
		print( self.x + self.y )

# creating list	
list = []

# appending instances to list
list.append( geeks(2, 3) )
list.append( geeks(12, 13) )
list.append( geeks(22, 33) )

for obj in list:
	# calling method
	obj.Sum()

# We can also access instances method
# as list[0].Sum() , list[1].Sum() and so on.

Popularity 9/10 Helpfulness 1/10 Language python

Source: Grepper

Tags: list python pyth

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Contributed on Apr 24 2022

Thoughtful Toucan

0 Answers Avg Quality 2/10

ListObjects

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