chore(Java): polish Java examples

Author: texastony

AwsCryptographicMaterialProviders/runtimes/java/src/examples/java/software/amazon/cryptography/example/hierarchy/mutations/DescribeMutationExample.java

@@ -3,6 +3,7 @@
 package software.amazon.cryptography.example.hierarchy.mutations;
 
 import static software.amazon.cryptography.example.hierarchy.mutations.MutationsProvider.MutableBranchKeyPropertiesToString;
+import static software.amazon.cryptography.example.hierarchy.mutations.MutationsProvider.MutationTokenToString;
 import static software.amazon.cryptography.example.hierarchy.mutations.MutationsProvider.MutationsToString;
 import static software.amazon.cryptography.example.hierarchy.mutations.MutationsProvider.executeInitialize;
 
@@ -75,7 +76,8 @@ public static DescribeMutationOutput Example(
       );
       // The Description object holds Details and the Token.
       System.out.println(
-        "The Token to continue the Mutation is: " + description.MutationToken()
+        "The Token to continue the Mutation is: " +
+        MutationTokenToString(description.MutationToken())
       );
       return output;
     }

AwsCryptographicMaterialProviders/runtimes/java/src/examples/java/software/amazon/cryptography/example/hierarchy/mutations/MutationExample.java

@@ -64,7 +64,8 @@ public static String End2End(
     String kmsKeyArnTerminal,
     String branchKeyId,
     @Nullable SystemKey systemKey,
-    @Nullable KeyStoreAdmin admin
+    @Nullable KeyStoreAdmin admin,
+    @Nullable Boolean doNotVersion
   ) {
     final SystemKey _systemKey = systemKey == null
       ? MutationsProvider.KmsSystemKey()
@@ -87,6 +88,7 @@ public static String End2End(
       .Identifier(branchKeyId)
       .Strategy(strategy)
       .SystemKey(_systemKey)
+      .DoNotVersion(doNotVersion)
       .build();
 
     InitializeMutationOutput initOutput = _admin.InitializeMutation(initInput);

AwsCryptographicMaterialProviders/runtimes/java/src/examples/java/software/amazon/cryptography/example/hierarchy/mutations/MutationsProvider.java

@@ -250,4 +250,15 @@ static String MutableBranchKeyPropertiesToString(
       properties.CustomEncryptionContext().toString()
     );
   }
+
+  static String MutationTokenToString(MutationToken token) {
+    return (
+      "branch-key-id: " +
+      token.Identifier() +
+      "\nuuid: " +
+      token.UUID() +
+      "\ncreateTime: " +
+      token.CreateTime()
+    );
+  }
 }

AwsCryptographicMaterialProviders/runtimes/java/src/testExamples/java/software/amazon/cryptography/example/hierarchy/ExampleTests.java

@@ -30,7 +30,8 @@ public void End2EndReEncryptTest() {
         Fixtures.POSTAL_HORN_KEY_ARN,
         branchKeyId,
         MutationsProvider.TrustStorage(),
-        AdminProvider.admin()
+        AdminProvider.admin(),
+        false
       );
     System.out.println(
       "\nMutated Branch Key: " +