Error: dynamodb is abstract cannot be instantiated

“Is abstract; cannot be instantiated” is a language or client-library error, not a DynamoDB service response. In Java, a service interface such as DynamoDbClient cannot be created with new. Use its builder. If the error names your model class, fix that model instead.

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.dynamodb.DynamoDbClient;

DynamoDbClient client = DynamoDbClient.builder()
    .region(Region.US_WEST_2)
    .build();

Reuse the client and close it when the application no longer needs it. Legacy AmazonDynamoDB belongs to Java SDK 1.x; migrate to the Java 2.x interface and builder rather than mixing packages.

For mapper errors, choose a concrete mapped type. A mutable Enhanced Client bean needs a public no-argument constructor and appropriate accessors; an immutable model needs its supported builder mapping. In Python, the normal factories are boto3.client("dynamodb") and boto3.resource("dynamodb"), but a Java compiler error is not fixed by a Python example.

See Java client examples and AWS documentation.