diff --git a/java/src/com/android/inputmethod/latin/InputPointers.java b/java/src/com/android/inputmethod/latin/InputPointers.java
index cbc916a7e..c01a373f2 100644
--- a/java/src/com/android/inputmethod/latin/InputPointers.java
+++ b/java/src/com/android/inputmethod/latin/InputPointers.java
@@ -124,4 +124,10 @@ public class InputPointers {
     public int[] getTimes() {
         return mTimes.getPrimitiveArray();
     }
+
+    @Override
+    public String toString() {
+        return "size=" + getPointerSize() + " id=" + mPointerIds + " time=" + mTimes
+                + " x=" + mXCoordinates + " y=" + mYCoordinates;
+    }
 }
diff --git a/java/src/com/android/inputmethod/latin/ResizableIntArray.java b/java/src/com/android/inputmethod/latin/ResizableIntArray.java
index 387d45a53..c660f92c4 100644
--- a/java/src/com/android/inputmethod/latin/ResizableIntArray.java
+++ b/java/src/com/android/inputmethod/latin/ResizableIntArray.java
@@ -131,4 +131,16 @@ public class ResizableIntArray {
             mLength = endPos;
         }
     }
+
+    @Override
+    public String toString() {
+        final StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < mLength; i++) {
+            if (i != 0) {
+                sb.append(",");
+            }
+            sb.append(mArray[i]);
+        }
+        return "[" + sb + "]";
+    }
 }