I'd like to include the following questions.

I have three extended examples, chapter 1, chapter 3 and chapter4. 
Is this too many examples, or not enough. Are the examples too long winded?
I'm wondering whether to add more examples or cut one out, and would appreciate your opinion on this.

With the catalog, do you understand each refactoring. Do you think
you could take the description in the catalog and carry out the refactoring
using that as the reference?

I have decided to use Java exclusively for the code in this book.
Do you think I should use multiple langauges, or just one. Can you see
how to apply these refactorings to other languages?