1 files changed, 6 insertions, 3 deletions
diff --git a/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
index e28fbfeb..6ff1aa46 100644
--- a/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
+++ b/gson/src/main/java/com/google/gson/internal/bind/JsonTreeWriter.java
@@ -26,6 +26,7 @@ import java.io.IOException;
 import java.io.Writer;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 /**
  * This writer creates a JsonElement.
@@ -130,9 +131,7 @@ public final class JsonTreeWriter extends JsonWriter {
   }
 
   @Override public JsonWriter name(String name) throws IOException {
-    if (name == null) {
-      throw new NullPointerException("name == null");
-    }
+    Objects.requireNonNull(name, "name == null");
     if (stack.isEmpty() || pendingName != null) {
       throw new IllegalStateException();
     }
@@ -152,6 +151,10 @@ public final class JsonTreeWriter extends JsonWriter {
     return this;
   }
 
+  @Override public JsonWriter jsonValue(String value) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
   @Override public JsonWriter nullValue() throws IOException {
     put(JsonNull.INSTANCE);
     return this;