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Working with the Nylas Contacts API and Java

Working with the Nylas Contacts API and Java

• 19 min read
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Author: Blag aka Alvaro Tejada Galindo
Blag aka Alvaro Tejada Galindo
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Have you ever wondered why you get a contact from someone who has only emailed you once? Contacts are usually created automatically when someone is not on our contact list, although this information is relatively limited. By managing contacts, we can complete this information (provided that we get it) or simply delete it if it’s not essential to us.

You might have already read Working with the Nylas Contacts API and Python or How to Manage Contacts with Nylas Node SDK, or even Working with the Nylas Contacts API and Ruby, and you may be wondering how I can work with contacts while using Java? Well, here’s how you can.

Is your system ready?

If you already have the Nylas Java SDK installed and your Java environment is configured, then continue along with the blog.

Otherwise, I would recommend that you read the post How to Send Emails with the Nylas Java SDK where the basic setup is clearly explained.

Return all contacts

Making sure that our contact list is in good shape, it’s something that we should be doing on a regular basis . We’re going to create a project called Read_Contacts with a main class called ReadContacts, which will return all contacts. Contacts come from two sources: inbox (auto generated via email) and address_book (manually created by us).

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Read_Contacts</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>ReadContacts</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>ReadContacts</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>ReadContacts</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.lang.IOException;
import java.util.Arrays;

//Import Nylas Packages
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;
import com.nylas.Contact;
import com.nylas.ContactQuery;
import com.nylas.Contacts;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

public class ReadContacts {
   public static void main(String[] args) throws RequestFailedException, IOException {
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       // Access the Contacts endpoint
       Contacts contacts = account.contacts();
       // We're accessing manually created contacts only
       RemoteCollection<Contact> contact_list = contacts.list(new ContactQuery().source("address_book"));
       // Loop through contacts
       for(Contact contact : contact_list){
           System.out.println(contact);
       }
   }
}

In order to run our project, we need to compile it first. In order to do this,  we can open a Terminal window, go to our project’s root folder and type the following maven command:

$ mvn package

Once it’s done, we can run this command to execute our application:

$ mvn exec:java -Dexec.mainClass="ReadContacts"
Read contacts

Most contacts, even the ones created manually, are going to contain missing information. By listing them, we can figure out what we need to fill out.

Return a contact

From the previous result, we can see that each contact is associated with an id. We can use that id to return a particular contact. Let’s create a file called Return_Contact with a main class called ReturnContact.

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Return_Contact</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>ReturnContact</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>ReturnContact</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>ReturnContact</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.io.IOException;
import java.util.Arrays;

//Import Nylas Packages
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;
import com.nylas.Contact;
import com.nylas.Contacts;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

public class ReturnContact {
   public static void main(String[] args) throws RequestFailedException, IOException {
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       // Access the Contacts endpoint
       Contacts contacts = account.contacts();
       // Return a contact by Id
       Contact contact = contacts.get("{contact_id}");
       // Print contact information
       System.out.println(contact);
   }
}

In order to run our project, we need to compile it first. In order to do this,  we can open a Terminal window, go to our project’s root folder and type the following maven command:

$ mvn package

Once it’s done, we can run this command to execute our application:

$ mvn exec:java -Dexec.mainClass="ReturnContact"
Return a contact

Sometimes we want to get the information from a particular contact. As you can see, using the Nylas SDK is fast and easy.

Create a new contact

When we create a new contact, it will be assigned to address_book. Keep in mind that we’re not going to be able to assign an image to the contact as the corresponding field picture_url is for reading only.

We’re going to create a project called Create_Contact with a main class called CreateContact.

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Create_Contact</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>CreateContact</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>CreateContact</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>CreateContact</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.io.IOException;
import java.util.Arrays;

//Import Nylas Packages
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;
import com.nylas.Contact;
import java.util.Arrays;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

public class CreateContact {
   public static void main(String[] args) throws RequestFailedException, IOException {
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       // Define a new contact object
       Contact contact = new Contact();
       // Name and Surname
       contact.setGivenName("Jade");
       contact.setSurname("Puget");
       // Personal or Work email
       contact.setEmails(Arrays.asList(new Contact.Email("personal", "[email protected]")));
       // Phone type and number
       contact.setPhoneNumbers(Arrays.asList(new Contact.PhoneNumber("mobile", "+15554567890")));
       // Save contact
       contact = account.contacts().create(contact);
       // Display new contact
       System.out.println(contact);
   }
}

In order to run our project, we need to compile it first. In order to do this,  we can open a Terminal window, go to our project’s root folder and type the following maven command:

$ mvn package

Once it’s done, we can run this command to execute our application:

$ mvn exec:java -Dexec.mainClass="CreateContact"
Create a new contact

We can of course specify more fields, but we’re saving that for the next section, which is how to update a contact.

Update a contact

Now that we know how to create a contact, we can also easily update it. We’re going to create a project called Update_Contact with a main class called UpdateContact.

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Update_Contact</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>UpdateContact</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>UpdateContact</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>UpdateContact</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.io.IOException;
import java.util.Arrays;

//Import Nylas Packages
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;
import com.nylas.Contact;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

public class UpdateContact {
   public static void main(String[] args) throws RequestFailedException, IOException {
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       // Access a contact by Id
       Contact contact = account.contacts().get("aifwbhc377hxkoqnxeplnzyvq");
       // Update fields
       contact.setCompanyName("A Fire Inside");
       contact.setNotes("Guitar for AFI");
       // Save changes and update contact
       contact = account.contacts().update(contact);
       // Print the contact information
       System.out.println(contact);
   }
}

In order to run our project, we need to compile it first. In order to do this,  we can open a Terminal window, go to our project’s root folder and type the following maven command:

$ mvn package

Once it’s done, we can run this command to execute our application:

$ mvn exec:java -Dexec.mainClass="UpdateContact"
Update an existing contact

Just by adding the needed fields, our contact gets successfully updated.

Download contact’s picture

If we know that any of our contacts have a profile picture, then we can easily download it. We’re going to create a new project called Download_ContactPicture and the main class will be called DownloadContactPicture. We’re going to download the picture and also display it.

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Download_ContactPicture</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>DownloadContactPicture</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>DownloadContactPicture</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>DownloadContactPicture</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import okhttp3.ResponseBody;
import java.util.Arrays;
import java.nio.file.Paths;
import java.nio.file.Files;

//Import Nylas Packages
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;
import com.nylas.Contact;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

import javax.imageio.ImageIO;

public class DownloadContactPicture {
   public static void main(String[] args) throws RequestFailedException, IOException {
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       try (ResponseBody picResponse = account.contacts().downloadProfilePicture("<CONTACT_ID>")) {
           Files.copy(picResponse.byteStream(), Paths.get("picture.jpg"));
       }catch (Exception e){
           System.out.println("Image was already downloaded");
       }

       // Create a frame
       var frame = new JFrame();
       // Load the image
       var icon = new ImageIcon("picture.jpg");
       // Create and add a label
       var label = new JLabel(icon);
       frame.add(label);
       // When closing the frame, the app ends
       frame.setDefaultCloseOperation
               (JFrame.EXIT_ON_CLOSE);
       frame.pack();
       // Show the frame
       frame.setVisible(true);
   }
}
Download picture

Delete a Contact

Now we have done everything we can with our contacts, it’s time to learn how to delete them. We’re going to create a new project called Delete_Contact with a main class called DeleteContact.

Here’s the pom.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>Nylas</groupId>
   <artifactId>Delete_Contact</artifactId>
   <version>1.0-SNAPSHOT</version>

   <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
       <maven.compiler.source>17</maven.compiler.source>
       <maven.compiler.target>17</maven.compiler.target>
   </properties>

   <dependencies>
       <dependency>
           <groupId>com.nylas.sdk</groupId>
           <artifactId>nylas-java-sdk</artifactId>
           <version>1.16.0</version>
       </dependency>
       <dependency>
           <groupId>org.slf4j</groupId>
           <artifactId>slf4j-jdk14</artifactId>
           <version>1.7.25</version>
       </dependency>
       <dependency>
           <groupId>io.github.cdimascio</groupId>
           <artifactId>dotenv-java</artifactId>
           <version>2.2.4</version>
       </dependency>
   </dependencies>

   <build>
       <pluginManagement>
           <plugins>
               <plugin>
                   <!-- Build an executable JAR -->
                   <groupId>org.apache.maven.plugins</groupId>
                   <artifactId>maven-jar-plugin</artifactId>
                   <version>3.1.0</version>
                   <configuration>
                       <archive>
                           <manifest>
                               <addClasspath>true</addClasspath>
                               <mainClass>DeleteContact</mainClass>
                           </manifest>
                       </archive>
                   </configuration>
               </plugin>
               <plugin>
                   <artifactId>maven-assembly-plugin</artifactId>
                   <configuration>
                       <archive>
                           <manifest>
                               <mainClass>DeleteContact</mainClass>
                           </manifest>
                       </archive>
                       <descriptorRefs>
                           <descriptorRef>jar-with-dependencies</descriptorRef>
                       </descriptorRefs>
                   </configuration>
               </plugin>
               <plugin>
                   <groupId>org.codehaus.mojo</groupId>
                   <artifactId>exec-maven-plugin</artifactId>
                   <version>1.2.1</version>
                   <executions>
                       <execution>
                           <phase>package</phase>
                           <goals>
                               <goal>java</goal>
                           </goals>
                       </execution>
                   </executions>
                   <configuration>
                       <mainClass>DeleteContact</mainClass>
                       <cleanupDaemonThreads>false</cleanupDaemonThreads>
                   </configuration>
               </plugin>
           </plugins>
       </pluginManagement>
   </build>

</project>

And here’s the source code:

//Import Java Utilities
import java.io.IOException;
import java.util.concurrent.TimeUnit;

//Import Nylas Packages
import com.nylas.JobStatus;
import com.nylas.RequestFailedException;
import com.nylas.NylasAccount;
import com.nylas.NylasClient;

//Import DotEnv to handle .env files
import io.github.cdimascio.dotenv.Dotenv;
import io.github.cdimascio.dotenv.DotenvException;

public class DeleteContact {
   public static void main(String[] args) throws RequestFailedException, IOException, InterruptedException {
       String contact = "";
       Dotenv dotenv = Dotenv.load();
       // Create the client object
       NylasClient client = new NylasClient();
       // Connect it to Nylas using the Access Token from the .env file
       NylasAccount account = client.account(dotenv.get("ACCESS_TOKEN"));

       try{
           // Delete contact using Id
           contact = account.contacts().delete("6qgrkap50t4lvgngx2elnclvu");
           System.out.println("Job Status Id: " + contact);
       }catch (Exception e){
           System.out.println("There was a problem trying to delete the contact");
       }
   }
}

In order to run our project, we need to compile it first. In order to do this,  we can open a Terminal window, go to our project’s root folder and type the following maven command:

$ mvn package

Once it’s done, we can run this command to execute our application:

$ mvn exec:java -Dexec.mainClass="DeleteContact"
Delete an existing contact

This job_status_id means that the contact is on queue to be deleted, and it will be deleted in the next few seconds.

Working with the Contacts API and Java becomes an easy job, when we use the right tools.

If you want to learn more, please go to our documentation page.

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