problem when converting a .const file (c++) to .java class

I have a .const file, lets say abc.const (a cpp file). the contents of that file is,

xyz :ullong:0x1000000000000000ULL yub :ullong:0x0100000000000000ULL .... ....

now i ve a program to convert this file to .java class.

But when i try above,

i got the following error

abc.java:255: ';' expected public static final long xyz = 0x1000000000000000ULL;

ho开发者_C百科w should i resolve this. thanks in advance??

( i need to generate a .java class from this .const file by solving this )

• There are no unsigned types in Java, so there's no "U" numeric literal specifier
• You only use a single L for a long in Java, which is always 64 bits
• You appear to have two leading 0s before the x.

So the Java would be:

public static final long xyz = 0x1000000000000000L;

Note that this won't be an exact equivalent of the C++, due to Java not having unsigned types as mentioned before. If you need to represent values larger than Long.MAX_VALUE, you should use the BigInteger class. If you're find with the restricted range of long, you're better off sticking with the primitive type.

There is no Java equivalent to an unsigned long long

If you need a number that large, you're going to have to use the BigInteger class:

http://download.oracle.com/javase/6/docs/api/java/math/BigInteger.html

That being said, the max value for a java long is 2^63-1. If that's big enough for you just change

0x100000000000000ULL

to

0x100000000000000L