Were the disciples frightened or gladdened when they saw Jesus?

And as they thus spake, Jesus himself stood in the midst of them, and saith unto them, Peace be unto you.  But they were terrified and affrighted, and supposed that they had seen a spirit.

Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace be unto you. And when he had so said, he shewed unto them his hands and his side. Then were the disciples glad, when they saw the Lord.