1 files changed, 2 insertions, 2 deletions
diff --git a/luni/src/main/java/java/text/DecimalFormat.java b/luni/src/main/java/java/text/DecimalFormat.java
index c0d67b8..948bec1 100644
--- a/luni/src/main/java/java/text/DecimalFormat.java
+++ b/luni/src/main/java/java/text/DecimalFormat.java
@@ -642,7 +642,7 @@ public class DecimalFormat extends NumberFormat {
     @Override
     public AttributedCharacterIterator formatToCharacterIterator(Object object) {
         if (object == null) {
-            throw new NullPointerException();
+            throw new NullPointerException("object == null");
         }
         return ndf.formatToCharacterIterator(object);
     }
@@ -1236,7 +1236,7 @@ public class DecimalFormat extends NumberFormat {
      */
     public void setRoundingMode(RoundingMode roundingMode) {
         if (roundingMode == null) {
-            throw new NullPointerException();
+            throw new NullPointerException("roundingMode == null");
         }
         this.roundingMode = roundingMode;
         if (roundingMode != RoundingMode.UNNECESSARY) { // ICU4C doesn't support UNNECESSARY.