question: public static String toInitLiteral ( List < long [ ] > llarr ) { List < String > slist = new ArrayList < String > ( ) ; for ( long [ ] larr : llarr ) { slist . add ( toInitLiteral ( larr ) ) ; } return "{" + StringUtils . join ( slist , "," ) + "}" ; }
target:  convert a list of long array to a initializer literal string.