| 219 |
|
return seed += gamma; |
| 220 |
|
} |
| 221 |
|
|
| 222 |
+ |
// IllegalArgumentException messages |
| 223 |
+ |
static final String BAD_BOUND = "bound must be positive"; |
| 224 |
+ |
static final String BAD_RANGE = "bound must be greater than origin"; |
| 225 |
+ |
static final String BAD_SIZE = "size must be non-negative"; |
| 226 |
+ |
|
| 227 |
|
/** |
| 228 |
|
* The seed generator for default constructors. |
| 229 |
|
*/ |
| 230 |
< |
private static final AtomicLong defaultGen = new AtomicLong(initialSeed()); |
| 231 |
< |
|
| 232 |
< |
private static long initialSeed() { |
| 233 |
< |
java.security.PrivilegedAction<Boolean> action = |
| 234 |
< |
() -> Boolean.getBoolean("java.util.secureRandomSeed"); |
| 235 |
< |
if (java.security.AccessController.doPrivileged(action)) { |
| 230 |
> |
private static final AtomicLong defaultGen |
| 231 |
> |
= new AtomicLong(mix64(System.currentTimeMillis()) ^ |
| 232 |
> |
mix64(System.nanoTime())); |
| 233 |
> |
|
| 234 |
> |
// at end of <clinit> to survive static initialization circularity |
| 235 |
> |
static { |
| 236 |
> |
if (java.security.AccessController.doPrivileged( |
| 237 |
> |
new java.security.PrivilegedAction<Boolean>() { |
| 238 |
> |
public Boolean run() { |
| 239 |
> |
return Boolean.getBoolean("java.util.secureRandomSeed"); |
| 240 |
> |
}})) { |
| 241 |
|
byte[] seedBytes = java.security.SecureRandom.getSeed(8); |
| 242 |
|
long s = (long)seedBytes[0] & 0xffL; |
| 243 |
|
for (int i = 1; i < 8; ++i) |
| 244 |
|
s = (s << 8) | ((long)seedBytes[i] & 0xffL); |
| 245 |
< |
return s; |
| 245 |
> |
defaultGen.set(s); |
| 246 |
|
} |
| 237 |
– |
return (mix64(System.currentTimeMillis()) ^ |
| 238 |
– |
mix64(System.nanoTime())); |
| 247 |
|
} |
| 248 |
|
|
| 241 |
– |
// IllegalArgumentException messages |
| 242 |
– |
static final String BAD_BOUND = "bound must be positive"; |
| 243 |
– |
static final String BAD_RANGE = "bound must be greater than origin"; |
| 244 |
– |
static final String BAD_SIZE = "size must be non-negative"; |
| 245 |
– |
|
| 249 |
|
/* |
| 250 |
|
* Internal versions of nextX methods used by streams, as well as |
| 251 |
|
* the public nextX(origin, bound) methods. These exist mainly to |
| 531 |
|
} |
| 532 |
|
|
| 533 |
|
/** |
| 534 |
+ |
* Generates a pseudorandom number with the indicated number of |
| 535 |
+ |
* bits. Unlike in superclass {@link Random}, this method is never |
| 536 |
+ |
* internally called or used by any other publicly accessible |
| 537 |
+ |
* method. |
| 538 |
+ |
* |
| 539 |
+ |
* @param bits random bits |
| 540 |
+ |
* @return the next pseudorandom value from this random number |
| 541 |
+ |
* generator's sequence |
| 542 |
+ |
*/ |
| 543 |
+ |
protected int next(int bits) { |
| 544 |
+ |
return (int)(nextLong() >>> (64 - bits)); |
| 545 |
+ |
} |
| 546 |
+ |
|
| 547 |
+ |
/** |
| 548 |
|
* Returns a pseudorandom {@code double} value between the specified |
| 549 |
|
* origin (inclusive) and bound (exclusive). |
| 550 |
|
* |
