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implement Random.nextBytes and Random.nextLong

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This commit is contained in:
Joel Dice
2008-09-26 15:30:08 -06:00
parent a16a00a7fb
commit 066714933c
1 changed files with 15 additions and 0 deletions
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15
classpath/java/util/Random.java
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@ -58,6 +58,21 @@ public class Random {
return next(32); return next(32);
} }
public void nextBytes(byte[] bytes) {
final int length = bytes.length;
for (int i = 0; i < length;) {
int r = nextInt();
for (int j = Math.min(length - i, 4); j > 0; --j) {
bytes[i++] = (byte) r;
r >>= 8;
}
}
}
public long nextLong() {
return ((long) next(32) << 32) + next(32);
}
public double nextDouble() { public double nextDouble() {
return (((long) next(26) << 27) + next(27)) / (double) (1L << 53); return (((long) next(26) << 27) + next(27)) / (double) (1L << 53);
} }