" Javadoc comments (/** and */ pairs) and code sections (marked by {} pairs) mark the start and end of folds. All other
" lines simply take the fold level that is going so far.
function! MyFoldLevel( lineNumber )
  let thisLine = getline( a:lineNumber )
  " If the entire Javadoc comment or the {} pair is on one line, then don't create a fold for it.
  if ( thisLine =~ '\%(\%(/\*\*\).*\%(\*/\)\)\|\%({.*}\)' )
    return '='
  elseif ( thisLine =~ '\%(^\s*/\*\*\s*$\)\|{' )
    return "a1"
  elseif ( thisLine =~ '\%(^\s*\*/\s*$\)\|}' )
    return "s1"
  endif
  return '='
endfunction
setlocal foldexpr=MyFoldLevel(v:lnum)
setlocal foldmethod=expr