question: public void testValueOfLongPositive2 ( ) { long longVal = 58930018L ; BigInteger aNumber = BigInteger . valueOf ( longVal ) ; byte rBytes [ ] = { 3 , - 125 , 51 , 98 } ; byte resBytes [ ] = new byte [ rBytes . length ] ; resBytes = aNumber . toByteArray ( ) ; for ( int i = 0 ; i < resBytes . length ; i ++ ) { assertTrue ( resBytes [ i ] == rBytes [ i ] ) ; } assertEquals ( "incorrect sign" , 1 , aNumber . signum ( ) ) ; }
target:  valueOf (long val): convert a positive long value to a BigInteger. The long value fits in integer.