Fix some compiler warnings

This CL fixes the following compiler warnings.

- Indirect access to static member
- Access to a non-accessible member of an enclosing type
- Parameter assignment
- Method can be static
- Local variable declaration hides another field or variable
- Value of local variable is not used
- Unused import
- Unused private member
- Unnecessary 'else' statement
- Unnecessary declaration of throw exception
- Redundant type arguments
- Missing '@Override' annotation
- Unused '@SuppressWarning' annotations

Bug: 18003991
Change-Id: Icfebe753e53a2cc621848f769d6a3d7ce501ebc7

1 files changed, 1 insertions, 4 deletions

diff --git a/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java b/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java
index fb36b7c50..d0df72479 100644
--- a/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/CollectionUtils.java
@@ -18,9 +18,6 @@ package com.android.inputmethod.latin.utils;
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
-import java.util.Map;
-import java.util.TreeMap;
 
 public final class CollectionUtils {
     private CollectionUtils() {
@@ -47,7 +44,7 @@ public final class CollectionUtils {
      * @param c Collection to test.
      * @return Whether c contains no elements.
      */
-    public static boolean isNullOrEmpty(final Collection c) {
+    public static boolean isNullOrEmpty(final Collection<?> c) {
         return c == null || c.isEmpty();
     }
 }