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A library to help Java developers easily access the SmartyStreets APIs.
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package examples;

import com.smartystreets.api.ClientBuilder;
import com.smartystreets.api.StaticCredentials;
import com.smartystreets.api.SharedCredentials;
import com.smartystreets.api.exceptions.SmartyException;
import com.smartystreets.api.us_extract.*;
import com.smartystreets.api.us_street.Candidate;
import com.smartystreets.api.us_street.MatchType;

import java.io.IOException;
import java.util.Arrays;

public class UsExtractExample {
    public static void main(String[] args) {
        // We recommend storing your authentication credentials in environment variables.
        // for server-to-server requests, use this code:
        //StaticCredentials credentials = new StaticCredentials(System.getenv("SMARTY_AUTH_ID"), System.getenv("SMARTY_AUTH_TOKEN"));

        // for client-side requests (browser/mobile), use this code:
        SharedCredentials credentials = new SharedCredentials(System.getenv("SMARTY_AUTH_WEB"), System.getenv("SMARTY_AUTH_REFERER"));

        Client client = new ClientBuilder(credentials).withLicenses(Arrays.asList("us-core-cloud")).buildUsExtractApiClient();
        String text = "Here is some text.\r\nMy address is 3785 Las Vegs Av." +
                "\r\nLos Vegas, Nevada." +
                "\r\nMeet me at 1 Rosedale Baltimore Maryland, not at 123 Phony Street, Boise Idaho." +
                "\r\n808 County Road 408 Brady, Tx.";

        // Documentation for input fields can be found at:
        // https://smartystreets.com/docs/cloud/us-extract-api#http-request-input-fields

        Lookup lookup = new Lookup(text);
        lookup.isAggressive(true);
        lookup.addressesHaveLineBreaks();
        lookup.getAddressesPerLine();
        lookup.setMatch(MatchType.ENHANCED);

        try {
            Result result = client.send(lookup);

            Metadata metadata = result.getMetadata();
            System.out.println("Found " + metadata.getAddressCount() + " addresses.");
            System.out.println(metadata.getVerifiedCount() + " of them were valid.");
            System.out.println();

            Address[] addresses = result.getAddresses();

            System.out.println("Addresses: \r\n**********************\r\n");
            for (Address address : addresses) {
                System.out.println("\"" + address.getText() + "\"\n");
                System.out.println("Verified? " + address.isVerified());
                if (address.getCandidates().length > 0) {
                    System.out.println("\nMatches:");

                    for (Candidate candidate : address.getCandidates()) {
                        System.out.println(candidate.getDeliveryLine1());
                        System.out.println(candidate.getLastLine());
                        System.out.println(candidate.getAnalysis().getEnhancedMatch());
                        System.out.println();
                    }
                } else System.out.println();

                System.out.println("**********************\n");
            }
        } catch (SmartyException | IOException | InterruptedException ex) {
            System.out.println(ex.getMessage());
            ex.printStackTrace();
        }
    }
}