question: public void testValueOfLongMin ( ) { long longVal = Long . MIN_VALUE ; BigInteger aNumber = BigInteger . valueOf ( longVal ) ; byte rBytes [ ] = { - 128 , 0 , 0 , 0 , 0 , 0 , 0 , 0 } ; 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 Long.MIN_VALUE to a BigInteger.