Examples with ThreadLocalRandom java.util.concurrent.ThreadLocalRandom used on opensource projects

Example 36 with ThreadLocalRandom

use of java.util.concurrent.ThreadLocalRandom in project jdk8u_jdk by JetBrains.

the class ThreadLocalRandomTest method testDoublesCount.

/**
     * A parallel sized stream of doubles generates the given number of values
     */
public void testDoublesCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    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 37 with ThreadLocalRandom

use of java.util.concurrent.ThreadLocalRandom in project jdk8u_jdk by JetBrains.

the class ThreadLocalRandomTest method testBadStreamBounds.

/**
     * Invoking bounded ints, long, doubles, with illegal bounds throws
     * IllegalArgumentException
     */
public void testBadStreamBounds() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.ints(2, 1));
    executeAndCatchIAE(() -> r.ints(10, 42, 42));
    executeAndCatchIAE(() -> r.longs(-1L, -1L));
    executeAndCatchIAE(() -> r.longs(10, 1L, -2L));
    testDoubleBadOriginBound((o, b) -> r.doubles(10, o, b));
}

Example 38 with ThreadLocalRandom

use of java.util.concurrent.ThreadLocalRandom in project jdk8u_jdk by JetBrains.

the class ThreadLocalRandomTest method testNextDoubleBadBound.

/**
     * nextDouble(bound) throws IllegalArgumentException
     */
public void testNextDoubleBadBound() {
    ThreadLocalRandom r = ThreadLocalRandom.current();
    executeAndCatchIAE(() -> r.nextDouble(0.0));
    executeAndCatchIAE(() -> r.nextDouble(-0.0));
    executeAndCatchIAE(() -> r.nextDouble(+0.0));
    executeAndCatchIAE(() -> r.nextDouble(-1.0));
    executeAndCatchIAE(() -> r.nextDouble(Double.NaN));
    executeAndCatchIAE(() -> r.nextDouble(Double.NEGATIVE_INFINITY));
// Returns Double.MAX_VALUE
//        executeAndCatchIAE(() -> r.nextDouble(Double.POSITIVE_INFINITY));
}

Example 39 with ThreadLocalRandom

use of java.util.concurrent.ThreadLocalRandom in project jdk8u_jdk by JetBrains.

the class ThreadLocalRandomTest method testUnsizedIntsCountSeq.

/**
     * A sequential unsized stream of ints generates at least 100 values
     */
public void testUnsizedIntsCountSeq() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.ints().limit(size).forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}

Example 40 with ThreadLocalRandom

use of java.util.concurrent.ThreadLocalRandom in project jdk8u_jdk by JetBrains.

the class ThreadLocalRandomTest method testUnsizedLongsCount.

/**
     * A parallel unsized stream of longs generates at least 100 values
     */
public void testUnsizedLongsCount() {
    LongAdder counter = new LongAdder();
    ThreadLocalRandom r = ThreadLocalRandom.current();
    long size = 100;
    r.longs().limit(size).parallel().forEach(x -> {
        counter.increment();
    });
    assertEquals(counter.sum(), size);
}