Eclipse, tab to space

Use spaces instead of tabs:

1. Windows > Preferences > Java > Code Style > Formatter > New (create new profile)
2.  Edit > "Tab policy" > "Space only" > [OK]
3. Windows > Preferences > General > Editors > Text Editors > "Insert spaces for tabs" > [Apply and Close]

Replaces tab with spaces when save:

1. Windows > Preferences > Java > Editor > Save Actions
2. [X] Additional Actions > [Configure] > Formatter [X] Correct indentation 
3. [OK] > [Apply and Close]