update of Scanner to handle longs with up to 53 bits only #186
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- was using |0, but that is only for int32
- sets upper/lower limit for long values to 53 bits
(+/-1FFFFFFFFFFFFF)
- fixes issues with number parsing involving limits and "0x"
- sets upper/lower limit for long values to 53 bits
(+/-1FFFFFFFFFFFFF)
- fixes issues with number parsing involving limits and "0x"
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restrictions on BitSet and Scanner
Because of the issue of long being only 53 bits, any time a method returns a long value, considerations must
be made as to whether this will work in JavaScript. In particular, BitSet and Scanner have issues.
In SwingJS, java.util.BitSet has been implemented as a 32-bit integer-based bitset. This was no problem in
Java 6, but starting with Java 7, a method was added to BitSet that allows for the extraction of the
underlying long[] word data. This is not work in JavaScript. Instead, SwingJS java.util.Bitset.toLongArray() will deliver
32-bit int[] data.
SwingJS Scanner has hasNextLong() and nextLong(), and although it will scan through long numbers,
Scanner will choke on long numbers greater than the JavaScript 53-bit limit. hasNextLong() will
return false, and nextLong() will throw an InputMismatchException triggered by the NumberFormatException
thrown by Long.parseLong().