import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.deser.std.StdScalarDeserializer;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;

public class AtomicIntegerDeserializer extends StdScalarDeserializer<AtomicInteger> {
    public AtomicIntegerDeserializer() {
        super(AtomicInteger.class);
    }

    @Override
    public AtomicInteger deserialize(JsonParser parser, DeserializationContext context) throws IOException {
        return new AtomicInteger(parser.getValueAsInt());
    }
}

This is a simple example of a custom deserializer for the AtomicInteger class in Jackson. This class extends StdScalarDeserializer and overrides the deserialize method to handle converting a JSON value to an AtomicInteger instance.