Null Coalescing in Java

Since Java doesn't have a null-coalescing operator like C# does, I wrote a method that does the same.  The code and tests:

public class Coalesce
{
   public static <T> T coalesce(T value, T defaultValue)
   {
      return value != null ? value : defaultValue;
   }
}

public class CoalesceTest
{
   @Test
   public void shouldReturnValueIfNotNull()
   {
      Double nonNullValue = 123d;
      Double defaultValue = 1d;
      Double result = coalesce(nonNullValue, defaultValue);
      assertEquals(nonNullValue, result);
   }

   @Test
   public void shouldReturnDefaultValueIfValueIsNull()
   {
      Double nullValue = null;
      Double defaultValue = 1d;
      Double result = coalesce(nullValue, defaultValue);
      assertEquals(defaultValue, result);
   }

   @Test
   public void shouldReturnNullIfBothArgumentsNull()
   {
      Double nullValue = null;
      Double defaultValue = null;
      Double result = coalesce(nullValue, defaultValue);
      assertNull(result);
   }
}

It looks like Google's Guava library has a firstNonNull method that does the same thing, the only difference being that it throws a NullPointerException if both arguments are null.  I guess throwing the exception makes sense, particularly if the name is firstNonNull, but at the moment I lean towards just having the method return null if both arguments are null, similar to how the C# operator works.