Visit Hatena Star and add your blog. After adding your blog you can get Hatena Star Javascript.
Click "Home".
Click "Blogs"
http://s.hatena.com/HatenaID/blogs
Enter your blog URL and click "Add"
Next visit Template page on Blogger.
Click "Expand Widget Templates"
Paste Hatena Star Javascript just before tag.
Find h3 tag.
Paste following HTML code.
<h3 class='post-title'><a expr:href='data:post.url' style='display:none;' title='permanent link'></a>
After click "SAVE TEMPLATE" you can see Hatena Star on your blog.
An example Blogger site is here.
For more information on customizing Hatena Star please visit this page.