Eclipse and curly braces
Yes, edit your active profile (Java...Code Style...Formatter), and change the brace positions to the next line. Also, in Java..Editor..Typing, you can have it automatically insert your braces at the correct position.
For pre-written block of code, first do the settings as suggested by Don and then select that piece of code and right click Source Code->Format and the formatting would take place as per the settings done in the preferences.