diff --git a/gson/src/main/java/com/google/gson/JsonSyntaxException.java b/gson/src/main/java/com/google/gson/JsonSyntaxException.java
index 23447e40..ffd875c5 100644
--- a/gson/src/main/java/com/google/gson/JsonSyntaxException.java
+++ b/gson/src/main/java/com/google/gson/JsonSyntaxException.java
@@ -36,7 +36,7 @@ public final class JsonSyntaxException extends JsonParseException {
 
   /**
    * Creates exception with the specified cause. Consider using
-   * {@link #JsonIOException(String, Throwable)} instead if you can describe what happened.
+   * {@link #JsonSyntaxException(String, Throwable)} instead if you can describe what happened.
    *
    * @param cause root exception that caused this exception to be thrown.
    */
diff --git a/gson/src/main/java/com/google/gson/LruCache.java b/gson/src/main/java/com/google/gson/LruCache.java
index 126f6ad6..947327e4 100644
--- a/gson/src/main/java/com/google/gson/LruCache.java
+++ b/gson/src/main/java/com/google/gson/LruCache.java
@@ -41,6 +41,7 @@ final class LruCache<K, V> extends LinkedHashMap<K, V> implements Cache<K, V> {
     put(key, value);
   }
 
+  @Override
   public void clear() {
     super.clear();
   }
@@ -53,6 +54,7 @@ final class LruCache<K, V> extends LinkedHashMap<K, V> implements Cache<K, V> {
     return remove(key);
   }
 
+  @Override
   public int size() {
     return super.size();
   }
diff --git a/gson/src/main/java/com/google/gson/Streams.java b/gson/src/main/java/com/google/gson/Streams.java
index 73b00949..c1c54dab 100644
--- a/gson/src/main/java/com/google/gson/Streams.java
+++ b/gson/src/main/java/com/google/gson/Streams.java
@@ -154,8 +154,8 @@ final class Streams {
       appendable.append((char) i);
     }
 
-    @Override public void flush() throws IOException {}
-    @Override public void close() throws IOException {}
+    @Override public void flush() {}
+    @Override public void close() {}
 
     /**
      * A mutable char sequence pointing at a single char[].
diff --git a/gson/src/main/java/com/google/gson/stream/JsonReader.java b/gson/src/main/java/com/google/gson/stream/JsonReader.java
index a136b3bb..46a2a521 100644
--- a/gson/src/main/java/com/google/gson/stream/JsonReader.java
+++ b/gson/src/main/java/com/google/gson/stream/JsonReader.java
@@ -564,7 +564,7 @@ public final class JsonReader implements Closeable {
     } catch (NumberFormatException ignored) {
       double asDouble = Double.parseDouble(value); // don't catch this NumberFormatException
       result = (long) asDouble;
-      if ((double) result != asDouble) {
+      if (result != asDouble) {
         throw new NumberFormatException(value);
       }
     }
@@ -599,7 +599,7 @@ public final class JsonReader implements Closeable {
     } catch (NumberFormatException ignored) {
       double asDouble = Double.parseDouble(value); // don't catch this NumberFormatException
       result = (int) asDouble;
-      if ((double) result != asDouble) {
+      if (result != asDouble) {
         throw new NumberFormatException(value);
       }
     }
@@ -665,6 +665,7 @@ public final class JsonReader implements Closeable {
     stack.set(stack.size() - 1, newTop);
   }
 
+  @SuppressWarnings("fallthrough")
   private JsonToken nextInArray(boolean firstElement) throws IOException {
     if (firstElement) {
       replaceTop(JsonScope.NONEMPTY_ARRAY);
@@ -706,6 +707,7 @@ public final class JsonReader implements Closeable {
     }
   }
 
+  @SuppressWarnings("fallthrough")
   private JsonToken nextInObject(boolean firstElement) throws IOException {
     /*
      * Read delimiters. Either a comma/semicolon separating this and the
@@ -780,6 +782,7 @@ public final class JsonReader implements Closeable {
     return nextValue();
   }
 
+  @SuppressWarnings("fallthrough")
   private JsonToken nextValue() throws IOException {
     int c = nextNonWhitespace();
     switch (c) {
@@ -968,6 +971,7 @@ public final class JsonReader implements Closeable {
    * Returns the string up to but not including any delimiter characters. This
    * does not consume the delimiter character.
    */
+  @SuppressWarnings("fallthrough")
   private String nextLiteral() throws IOException {
     StringBuilder builder = null;
     do {
diff --git a/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java b/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
index 7ca13873..b7f76e9e 100644
--- a/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
+++ b/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
@@ -97,7 +97,7 @@ public final class JsonReaderTest extends TestCase {
     }
   }
 
-  public void testEmptyString() throws IOException {
+  public void testEmptyString() {
     try {
       new JsonReader(new StringReader("")).beginArray();
     } catch (IOException expected) {
@@ -108,7 +108,7 @@ public final class JsonReaderTest extends TestCase {
     }
   }
 
-  public void testNoTopLevelObject() throws IOException {
+  public void testNoTopLevelObject() {
     try {
       new JsonReader(new StringReader("true")).nextBoolean();
     } catch (IOException expected) {