question: public static String formatMemorySize ( long arg ) { if ( arg >= 1024 * 1024 * 1024 ) return String . format ( "%d GB" , arg / ( 1024 * 1024 * 1024 ) ) ; else if ( arg >= 1024 * 1024 ) return String . format ( "%d MB" , arg / ( 1024 * 1024 ) ) ; else if ( arg >= 1024 ) return String . format ( "%d KB" , arg / ( 1024 ) ) ; else return String . format ( "%d" , arg ) ; }
target:  Format a memory size with g/m/k quantifiers into its number representation.