all spaces replaced by tabs when ctrl+shift+f

Question

working in eclipse,when I type 'tab',it insert 4 spaces,it works well.but after ctrl +shift +f to format,all the 4 space will been replaced by tabs.how to stop it?

Answer 1

Window->Preferences->Java->Code Style->Formatter: Edit Active profile->Indentation->Tab Policy: Select Spaces

You can't change the default profiles so you must provide a new profile name, then press the Apply button, then the Okay button. It may help to press the Apply button once you have returned to the Formatter screen. Go back and look at the Tab Policy again to verify that your changes were saved.