question: @ Override public boolean accept ( File f ) { if ( f != null ) { if ( f . isDirectory ( ) ) { return true ; } String extension = getExtension ( f ) ; if ( extension != null && filters . get ( getExtension ( f ) ) != null ) { return true ; } ; } return false ; }
target:  Return true if this file should be shown in the directory pane, false if it shouldn't. Files that begin with "." are ignored.