Removed unnecessary imports.

Author: mderka

README.md

@@ -252,7 +252,6 @@ Zone zone = dns.create(zoneInfo);
 The second snippet shows how to create records inside a zone. The complete code can be found on [CreateOrUpdateRecordSets.java](./gcloud-java-examples/src/main/java/com/google/gcloud/examples/dns/snippets/CreateOrUpdateRecordSets.java).
 
 ```java
-import com.google.gcloud.dns.ChangeRequest;
 import com.google.gcloud.dns.ChangeRequestInfo;
 import com.google.gcloud.dns.Dns;
 import com.google.gcloud.dns.DnsOptions;

gcloud-java-dns/README.md

@@ -159,7 +159,6 @@ our zone that creates a record set of type A and points URL www.someexampledomai
 IP address 12.13.14.15. Start by adding
 
 ```java
-import com.google.gcloud.dns.ChangeRequest;
 import com.google.gcloud.dns.ChangeRequestInfo;
 import com.google.gcloud.dns.RecordSet;
 
@@ -221,7 +220,7 @@ When the change request is applied, it is registered with the Cloud DNS service
 can wait for its completion as follows:
 
 ```java
-while (ChangeRequest.Status.PENDING.equals(changeRequest.status())) {
+while (ChangeRequestInfo.Status.PENDING.equals(changeRequest.status())) {
   try {
     Thread.sleep(500L);
   } catch (InterruptedException e) {
@@ -263,9 +262,17 @@ while (recordSetIterator.hasNext()) {
 }
 ```
 
-You can also list the history of change requests that were applied to a zone:
+You can also list the history of change requests that were applied to a zone.
+First add:
 
 ```java
+import java.util.ChangeRequest;
+```
+
+and then:
+
+```java
+
 // List the change requests applied to a particular zone
 Iterator<ChangeRequest> changeIterator = zone.listChangeRequests().iterateAll();
 System.out.println(String.format("The history of changes in %s:", zone.name()));
@@ -298,7 +305,7 @@ if (!changeRequest.deletions().isEmpty()) {
   // Wait for change to finish, but save data traffic by transferring only ID and status
   Dns.ChangeRequestOption option =
       Dns.ChangeRequestOption.fields(Dns.ChangeRequestField.STATUS);
-  while (ChangeRequest.Status.PENDING.equals(changeRequest.status())) {
+  while (ChangeRequestInfo.Status.PENDING.equals(changeRequest.status())) {
     System.out.println("Waiting for change to complete. Going to sleep for 500ms...");
     try {
       Thread.sleep(500);

gcloud-java-dns/src/main/java/com/google/gcloud/dns/ChangeRequest.java

@@ -161,13 +161,14 @@ public Builder toBuilder() {
 
   @Override
   public boolean equals(Object obj) {
-    if (obj.getClass().equals(ChangeRequest.class)) {
+    if (obj == null || !obj.getClass().equals(ChangeRequest.class)) {
+      return false
+    } else {
       ChangeRequest other = (ChangeRequest) obj;
       return Objects.equals(options, other.options)
           && Objects.equals(zone, other.zone)
           && Objects.equals(toPb(), other.toPb());
     }
-    return false;
   }
 
   @Override

gcloud-java-examples/src/main/java/com/google/gcloud/examples/dns/snippets/CreateOrUpdateRecordSets.java

@@ -22,7 +22,6 @@
 
 package com.google.gcloud.examples.dns.snippets;
 
-import com.google.gcloud.dns.ChangeRequest;
 import com.google.gcloud.dns.ChangeRequestInfo;
 import com.google.gcloud.dns.Dns;
 import com.google.gcloud.dns.DnsOptions;

gcloud-java-examples/src/main/java/com/google/gcloud/examples/dns/snippets/DeleteZone.java

@@ -22,7 +22,6 @@
 
 package com.google.gcloud.examples.dns.snippets;
 
-import com.google.gcloud.dns.ChangeRequest;
 import com.google.gcloud.dns.ChangeRequestInfo;
 import com.google.gcloud.dns.Dns;
 import com.google.gcloud.dns.DnsOptions;
@@ -65,7 +64,7 @@ public static void main(String... args) {
       // Wait for change to finish, but save data traffic by transferring only ID and status
       Dns.ChangeRequestOption option =
           Dns.ChangeRequestOption.fields(Dns.ChangeRequestField.STATUS);
-      while (ChangeRequest.Status.PENDING.equals(changeRequest.status())) {
+      while (ChangeRequestInfo.Status.PENDING.equals(changeRequest.status())) {
         System.out.println("Waiting for change to complete. Going to sleep for 500ms...");
         try {
           Thread.sleep(500);

gcloud-java-examples/src/main/java/com/google/gcloud/examples/dns/snippets/ManipulateZonesAndRecordSets.java

@@ -83,7 +83,7 @@ public static void main(String... args) {
     ChangeRequestInfo changeRequest = changeBuilder.build();
     zone.applyChangeRequest(changeRequest);
 
-    while (ChangeRequest.Status.PENDING.equals(changeRequest.status())) {
+    while (ChangeRequestInfo.Status.PENDING.equals(changeRequest.status())) {
       try {
         Thread.sleep(500L);
       } catch (InterruptedException e) {