1 files changed, 5 insertions, 1 deletions
diff --git a/common/src/com/android/inputmethod/latin/common/Constants.java b/common/src/com/android/inputmethod/latin/common/Constants.java
index 8f4a1e50d..abc377a84 100644
--- a/common/src/com/android/inputmethod/latin/common/Constants.java
+++ b/common/src/com/android/inputmethod/latin/common/Constants.java
@@ -18,6 +18,8 @@ package com.android.inputmethod.latin.common;
 
 import com.android.inputmethod.annotations.UsedForTesting;
 
+import javax.annotation.Nonnull;
+
 public final class Constants {
     public static final class Color {
         /**
@@ -259,6 +261,7 @@ public final class Constants {
         return code >= CODE_SPACE;
     }
 
+    @Nonnull
     public static String printableCode(final int code) {
         switch (code) {
         case CODE_SHIFT: return "shift";
@@ -286,7 +289,8 @@ public final class Constants {
         }
     }
 
-    public static String printableCodes(final int[] codes) {
+    @Nonnull
+    public static String printableCodes(@Nonnull final int[] codes) {
         final StringBuilder sb = new StringBuilder();
         boolean addDelimiter = false;
         for (final int code : codes) {