N1QL Query two ways

Main.java

package com.couchbase.client.example;

import com.couchbase.client.java.Bucket;
import com.couchbase.client.java.Cluster;
import com.couchbase.client.java.CouchbaseCluster;
import com.couchbase.client.java.document.json.JsonObject;
import com.couchbase.client.java.query.*;
import static com.couchbase.client.java.query.Select.select;
import static com.couchbase.client.java.query.dsl.Expression.*;
import static com.couchbase.client.java.query.Select.select;

public class Main {

    public static void main (String args[]) {

        Cluster cluster = CouchbaseCluster.create();
        Bucket bucket = cluster.openBucket("travel-sample");

        // query with a simple string
        System.out.println("Simple string query:");
        N1qlQuery airlineQuery = N1qlQuery.simple("SELECT `travel-sample`.* FROM `travel-sample` WHERE name=\"United Airlines\" AND type=\"airline\"");
        N1qlQueryResult queryResult = bucket.query(airlineQuery);

        for (N1qlQueryRow result: queryResult) {
            System.out.println(result.value());
        }

        //query with a parameter using the DSL
        System.out.println("Parameterized query using the DSL:");
        Statement statement = select(path(i("travel-sample"), "*")).from(i("travel-sample")).where(x("name").eq(x("$airline_param")).and(x("type").eq(s("airline"))));
        JsonObject placeholderValues = JsonObject.create().put("airline_param", "United Airlines");
        N1qlQuery airlineQueryParameterized = N1qlQuery.parameterized(statement, placeholderValues);
        N1qlQueryResult queryResultParameterized = bucket.query(airlineQueryParameterized);

        for (N1qlQueryRow row : queryResultParameterized) {
            System.out.println(row);
        }

    }
}