Example usage for org.apache.commons.math3.random RandomGenerator nextBytes

Introduction

In this page you can find the example usage for org.apache.commons.math3.random RandomGenerator nextBytes.

Prototype

void nextBytes(byte[] bytes);

Source Link

Document

Generates random bytes and places them into a user-supplied byte array.

Usage

From source file:com.github.rinde.rinsim.core.model.rand.RandomModelTest.java

static void testUnmodifiable(RandomGenerator rng) {
    boolean fail = false;
    try {// w w w.  j  av a 2  s .  c  o  m
        rng.setSeed(0);
    } catch (final UnsupportedOperationException e) {
        fail = true;
    }
    assertTrue(fail);
    fail = false;
    try {
        rng.setSeed(new int[] { 0 });
    } catch (final UnsupportedOperationException e) {
        fail = true;
    }
    assertTrue(fail);
    fail = false;
    try {
        rng.setSeed(123L);
    } catch (final UnsupportedOperationException e) {
        fail = true;
    }
    assertTrue(fail);
    fail = false;

    rng.nextBoolean();
    rng.nextBytes(new byte[] {});
    rng.nextDouble();
    rng.nextFloat();
    rng.nextGaussian();
    rng.nextInt();
    rng.nextInt(1);
    rng.nextLong();
}

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From source file:com.milaboratory.primitivio.PrimitivIOTest.java

@Test
public void testDefaultSerialization1() throws Exception {
    RandomGenerator rg = new Well19937c();
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    PrimitivO po = new PrimitivO(bos);
    byte[] bytes = new byte[100];
    rg.nextBytes(bytes);
    int[] ints = new int[100];
    for (int i = 0; i < ints.length; i++)
        ints[i] = rg.nextInt(Integer.MAX_VALUE);
    int cc = 10;//  w ww  .  jav  a 2s.com
    for (int i = 0; i < cc; ++i) {
        po.writeObject(bytes);
        po.writeObject(ints);
    }

    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    PrimitivI pi = new PrimitivI(bis);
    for (int i = 0; i < cc; ++i) {
        Assert.assertArrayEquals(bytes, pi.readObject(byte[].class));
        Assert.assertArrayEquals(ints, pi.readObject(int[].class));
    }
}

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