The necessary steps include:

1. Add the following imports to your project:

import java.util.ArrayList;
import java.util.List;
import com.google.cloud.translate.Translate;
import com.google.cloud.translate.TranslateOptions;
import com.google.cloud.translate.Translation;

2. Add the following statement to the main method. This will create an instance of the Translate class, which will perform the translations:

Translate translate = TranslateOptions.getDefaultInstance().getService();

3. Add the following code sequence to define a Greek string, perform the translation, and display the result:

String text = "Αυτοκινητόδρομος";
Translation translation = translate.translate(text);
System.out.printf("%-16s Translation: %s
", text, translation.getTranslatedText());

4. Execute the program. You will get the following output:

Αυτοκινητόδρομος Translation: Highway