Is there a keyboard shortcut to select all the line your cursor is currently on? In Eclipse? Or even in general on Windows/Linux?
Solution for Eclipse:
Hold Alt and press ↑ and ↓.
Alt + ↑ and ↓ will move an entire line up or down, so just move it back and you end up with the entire line selected. Thus, the order of ↑ and ↓ does not matter.