Use spaces instead of tabs in Eclipse

http://stackoverflow.com/questions/407929/how-do-i-change-eclipse-to-use-spaces-instead-of-tabs

On Eclipse 3.6

 Window->Preferences->General->Editors->Text Editors->Insert spaces for tabs

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 “Window -> Preferences -> Java -> Code Style -> Formatter”

Active Profile:
new a profile  => choose "spaces only" for "tab policy" in the first tab "Indentation"

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If you havent got too much code, you could do a search and replace manually.

Find: \t
Replace: (4 spaces)

and check the "Regular expressions" option.