c# - Unsigned operator in Java -

as know, java doesn't have unsigned types. have convert snippet in c# (uses uint) java. code here:

private const int rolling_window = 7; private const int hash_prime = 0x01000193; private unit h1, h2, h3, n; private byte[] window;  //...  private uint roll_hash(byte c) {     h2 -= h1;     h2 += (uint)rolling_window * c;      h1 += c;     h1 -= window[n % rolling_window];      window[n % rolling_window] = c;     n++;      h3 = (h3 << 5);     h3 ^= c;      return h1 + h2 + h3; }  private static uint sum_hash(byte c, uint h) {         h *= hash_prime;         h ^= c;         return h; } 

in java use long instead of uint result gives negative values. solution using unsigned operators. searching show me 0xffffffffl quite complicate while deadline coming. wish me in problem. thanks

the code same. % operation different.

window[(int)((n & 0xffffffffl) % rolling_window)] 

or write

window[n] 

and

if(++n == rolling_window) n = 0; 

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in more detail

private int roll_hash(byte c) {     h2 -= h1; // same     h2 += rolling_window * c; // same, remove (uint)      h1 += c; // same     h1 -= window[n];      window[n] = c;     if(++n == rolling_window) n = 0; // limit n 0 6 % not required.      h3 = (h3 << 5); // same     h3 ^= c; // same      return h1 + h2 + h3; // same }  private static int sum_hash(byte c, int h) {         h *= hash_prime; // same         h ^= c; // same         return h; }