Examples with SplittableRandom java.util.SplittableRandom used on opensource projects

Example 11 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testBoundedInts.

/**
     * Each of a parallel sized stream of bounded ints is within bounds
     */
public void testBoundedInts() {
    AtomicInteger fails = new AtomicInteger(0);
    SplittableRandom r = new SplittableRandom();
    long size = 12345L;
    for (int least = -15485867; least < MAX_INT_BOUND; least += 524959) {
        for (int bound = least + 2; bound > least && bound < MAX_INT_BOUND; bound += 67867967) {
            final int lo = least, hi = bound;
            r.ints(size, lo, hi).parallel().forEach(x -> {
                if (x < lo || x >= hi)
                    fails.getAndIncrement();
            });
        }
    }
    assertEquals(fails.get(), 0);
}

Example 12 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testNextLongBadBounds.

/**
     * nextLong(least >= bound) throws IllegalArgumentException
     */
@Test(expectedExceptions = IllegalArgumentException.class)
public void testNextLongBadBounds() {
    SplittableRandom sr = new SplittableRandom();
    long f = sr.nextLong(17, 2);
}

Example 13 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testSplit1.

/**
     * A SplittableRandom produced by split() of a default-constructed
     * SplittableRandom generates a different sequence
     */
public void testSplit1() {
    SplittableRandom sr = new SplittableRandom();
    for (int reps = 0; reps < REPS; ++reps) {
        SplittableRandom sc = sr.split();
        int i = 0;
        while (i < NCALLS && sr.nextLong() == sc.nextLong()) ++i;
        assertTrue(i < NCALLS);
    }
}

Example 14 with SplittableRandom

use of java.util.SplittableRandom in project jdk8u_jdk by JetBrains.

the class SplittableRandomTest method testDoublesCount.

/**
     * A parallel sized stream of doubles generates the given number of values
     */
public void testDoublesCount() {
    LongAdder counter = new LongAdder();
    SplittableRandom r = new SplittableRandom();
    long size = 0;
    for (int reps = 0; reps < REPS; ++reps) {
        counter.reset();
        r.doubles(size).parallel().forEach(x -> {
            counter.increment();
        });
        assertEquals(counter.sum(), size);
        size += 524959;
    }
}

Example 15 with SplittableRandom

use of java.util.SplittableRandom in project intellij-community by JetBrains.

the class Main method generateLimit.

public static void generateLimit() {
    Integer acc = 0;
    SplittableRandom splittableRandom = new SplittableRandom(1);
    for (long count = 100; count > 0; count--) {
        Integer integer = 500;
        acc = splittableRandom.nextInt(acc, integer);
    }
    int n1 = acc;
    System.out.println(n1);
}