import com.alibaba.maxgraph.credentials.CredentialsManager;
import com.alibaba.maxgraph.io.MaxGraphIORegistry;
import org.apache.tinkerpop.gremlin.driver.*;
import org.apache.tinkerpop.gremlin.driver.MessageSerializer;
import org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0;
import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoMapper;

public class GraphComputeJavaSDKExample {
    public static void main(String[] args) {
        Cluster cluster;
        Client client;
        CredentialsManager credentialsManager;
      
      	String accessKey = "This is your accessKey";
        String accessSecret = "This is your accessSecret";

        String instanceDomain = "This is your instance domain";
        int instanceDomainPort = 80; //This is your port of instance domain
        
        credentialsManager = new CredentialsManager(accessKey, accessSecret);

        GryoMapper.Builder kryo = 
          GryoMapper.build().addRegistry(MaxGraphIORegistry.getInstance());
        MessageSerializer serializer = 
          new GryoMessageSerializerV1d0(kryo);
        try {
            cluster = Cluster.build()
                    .addContactPoint(instanceDomain)
                    .port(instanceDomainPort)
                    .serializer(serializer)
                    .credentials(credentialsManager.getUserName(), 
                                 credentialsManager.getPassword())
                    .create();
        } catch (Exception e) {
            throw new IllegalArgumentException("build credentials fail", e);
        }
        client = cluster.connect();
      	String query="your Gremlin Query";
        ResultSet resultSet = client.submit("g.V()");
      	...
        //don't forget close the connection
        client.close();
        cluster.close();
    }
}