Add missing Java messaging service code sample

Author: hortega

messaging/services/service-alpha-add/service-alpha-add.7.x.java

@@ -11,7 +11,7 @@ public static void main(String[] args) {
         Twilio.init(ACCOUNT_SID, AUTH_TOKEN);
 
         String pathServiceSid = "MG2172dd2db502e20dd981ef0d67850e1a";
-        String pathSid = "My company";
-        AlphaSender.creator(pathServiceSid, pathSid).create();
+        String alphaSender = "My company";
+        AlphaSender.creator(pathServiceSid, alphaSender).create();
     }
 }

messaging/services/service-multiple-number-add/service-multiple-number-add-1.7.x.java

@@ -0,0 +1,31 @@
+import com.twilio.Twilio;
+import com.twilio.base.ResourceSet;
+import com.twilio.rest.messaging.v1.service.PhoneNumber;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class Example {
+    // Find your Account Sid and Token at twilio.com/console
+    public static final String ACCOUNT_SID = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";
+    public static final String AUTH_TOKEN = "your_auth_token";
+
+    public static void main(String[] args) {
+        // Initialize the client
+        Twilio.init(ACCOUNT_SID, AUTH_TOKEN);
+
+        String pathServiceSid = "MG2172dd2db502e20dd981ef0d67850e1a";
+        List<String> phoneNumberSids = Arrays
+                .asList("PN2a0747eba6abf96b7e3c3ff0b4530f6e",
+                        "PN557ce644e5ab84fa21cc21112e22c485",
+                        "PN2a0747eba6abf96b7e3c3ff0b4530f6e");
+
+        for (String phoneNumberSid : phoneNumberSids) {
+            PhoneNumber phoneNumber = PhoneNumber
+                    .creator(pathServiceSid, phoneNumberSid)
+                    .create();
+
+            System.out.println(phoneNumber);
+        }
+    }
+}