I had a look at: Eclipse-Shortcuts, but I found nothing for generating a constructor.
Whats the shortcut for generating a standard constructor?
For Mac Users it is
Option + Command(⌘) + S or
Command(⌘) + Option + S will open the pop up.
There are several ways you can follow.
Goto Source ---> Generate constructor using Fields
Under Source Title bar, select the Generate constructor using Fields option.
Or
Ctrl+Space
which displays the various suggestions possible, from there you can go for the default contructor.
Alt+Shift+s and then o opens the Generate Constructor using Fields
dialog.