Implement some of the missing methods in ThreadLocalRandom
@@ -28,7 +28,72 @@ public class TThreadLocalRandom extends Random {
}
@Override
- public synchronized void setSeed(long seed) {
+ public void setSeed(long seed) {
throw new UnsupportedOperationException();
}
+
+ public int nextInt(int origin, int bound) {
+ if (origin >= bound) {
+ throw new IllegalArgumentException();
+ }
+ int range = bound - origin;
+ if (range < 0) {
+ return nextInt(bound - origin) + origin;
+ } else {
+ while (true) {
+ int value = nextInt();
+ if (value >= origin && value < bound) {
+ return value;
+ }
+ }
+ }
+ }
+
+ public long nextLong(long bound) {
+ if (bound <= 0) {
+ throw new IllegalArgumentException();
+ }
+ while (true) {
+ long value = nextLong();
+ long result = value % bound;
+ if (value - result + (bound - 1) < 0) {
+ return result;
+ }
+ }
+ }
+
+ public long nextLong(long origin, long bound) {
+ if (origin >= bound) {
+ throw new IllegalArgumentException();
+ }
+ long range = bound - origin;
+ if (range < 0) {
+ return nextLong(bound - origin) + origin;
+ } else {
+ while (true) {
+ long value = nextLong();
+ if (value >= origin && value < bound) {
+ return value;
+ }
+ }
+ }
+ }
+
+ public double nextDouble(double bound) {
+ if (bound <= 0) {
+ throw new IllegalArgumentException();
+ }
+ double value = nextDouble() * bound;
+ if (value == bound) {
+ value = Math.nextDown(value);
+ }
+ return value;
+ }
+
+ public double nextDouble(double origin, double bound) {
+ if (origin >= bound) {
+ throw new IllegalArgumentException();
+ }
+ return origin + nextDouble(bound - origin);
+ }
}
