calculating CRC32

[chrisalex via Digitalmars-d-learn]

I'm trying to calculate CRC32 and it keeps giving me the wrong 
result.

>void main(string[] args)
>{
>    CRC32Digest test = new CRC32Digest();
>    ubyte[] data = [1,5,2,3,4];
>    test.put(data);
>    auto data2 = test.finish();
>    writeln((data2[0] << 24) | (data2[1] << 16) | ((data2[2]) << 
> 8) | (data2[3]));
>    writeln((data2[0]) | (data2[1] << 8) | ((data2[2]) << 16) | 
> (data2[3] << 24));
>}

this writes out

>728586467
>-480744149

but when calculating CRC32 with java, I get

>3814223147

Not sure what I'm doing wrong. I tried reversing data[] as well.