What techniques did the author use to develop the the character hamlet? * techniques the author uses ie. description, action, contrast, dialogue, narration.

Really all of your examples apply to Hamlet. Hamlet is such a complex character. It is famously difficult to pin down his true thoughts and feelings -- does he love Ophelia, and does he really intend to kill Claudius? In fact, it often seems as though Hamlet pursues lines of thought and emotion merely for their experimental value, testing this or that idea without any interest in applying his resolutions in the practical world. The variety of his moods, from manic to somber, seems to cover much of the range of human possibility. He frequently second guesses himself and belittles himself and at other times feels a sense of courage and action. This juxtaposition adds to the many facets of Hamlet's character that make him so interesting. Consider that he calls himself a coward and pledges to be brave in the same soliloquy.

How all occasions do inform against me, And spur my dull revenge!