本文整理了Java中java.util.Random.nextInt()方法的一些代码示例，展示了Random.nextInt()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Random.nextInt()方法的具体详情如下：
包路径：java.util.Random
类名称：Random
方法名：nextInt

Random.nextInt介绍

[英]Returns a pseudo-random uniformly distributed int.
[中]返回伪随机均匀分布整数。

代码示例

代码示例来源：origin: hankcs/HanLP

public static <T> void shuffleArray(T[] ar)
{
  Random rnd = new Random();
  for (int i = ar.length - 1; i > 0; i--)
  {
    int index = rnd.nextInt(i + 1);
    // Simple swap
    T a = ar[index];
    ar[index] = ar[i];
    ar[i] = a;
  }
}

代码示例来源：origin: apache/rocketmq

@Override
  public MessageQueue select(List<MessageQueue> mqs, Message msg, Object arg) {
    int value = random.nextInt(mqs.size());
    return mqs.get(value);
  }
}

代码示例来源：origin: apache/incubator-shardingsphere

@Override
  public String getDataSource(final String name, final String masterDataSourceName, final List<String> slaveDataSourceNames) {
    return slaveDataSourceNames.get(new Random().nextInt(slaveDataSourceNames.size()));
  }
}

代码示例来源：origin: apache/incubator-druid

private void generateVals(final int totalSize, final int maxValue)
{
 vals = new ArrayList<>(totalSize);
 for (int i = 0; i < totalSize; ++i) {
  int len = rand.nextInt(2) + 1;
  int[] subVals = new int[len];
  for (int j = 0; j < len; ++j) {
   subVals[j] = rand.nextInt(maxValue);
  }
  vals.add(subVals);
 }
}

代码示例来源：origin: alibaba/arthas

public static void main(String[] args) throws InterruptedException {
  List<Pojo> list = new ArrayList<Pojo>();
  for (int i = 0; i < 40; i ++) {
    Pojo pojo = new Pojo();
    pojo.setName("name " + i);
    pojo.setAge(i + 2);
    list.add(pojo);
  }
  System.out.println(p);
  while (true) {
    int random = new Random().nextInt(40);
    String name = list.get(random).getName();
    list.get(random).setName(null);
    test(list);
    list.get(random).setName(name);
    Thread.sleep(1000L);
  }
}

代码示例来源：origin: google/guava

private static <T> List<T> shuffledCopy(List<T> in, Random random) {
  List<T> mutable = newArrayList(in);
  List<T> out = newArrayList();
  while (!mutable.isEmpty()) {
   out.add(mutable.remove(random.nextInt(mutable.size())));
  }
  return out;
 }
}

代码示例来源：origin: google/guava

public void testIteratorTester() throws Exception {
 Random random = new Random(0);
 List<Integer> list = Lists.newArrayList();
 for (int i = 0; i < 3; i++) {
  list.add(random.nextInt());
 }
 runIterator(list, 6);
}

代码示例来源：origin: stackoverflow.com

int[] array = new int[10];
Random rand = new Random();
for (int i = 0; i < array.length; i++)
  array[i] = rand.nextInt(100) + 1;
Arrays.sort(array);
System.out.println(Arrays.toString(array));
// in reverse order
for (int i = array.length - 1; i >= 0; i--)
  System.out.print(array[i] + " ");
System.out.println();

代码示例来源：origin: stanfordnlp/CoreNLP

public static void main(String[] args) {
 Properties config = StringUtils.argsToProperties(args);
 log.info(config);
 boolean fullSentence = PropertiesUtils.getBool(config, "fullSentence", false);
 Random random = new Random();
 String tagSeparator = config.getProperty("tagSeparator", TaggerConfig.TAG_SEPARATOR);
 TaggedFileRecord record = TaggedFileRecord.createRecord(config, config.getProperty("input"));
 for (List<TaggedWord> sentence : record.reader()) {
  int len = random.nextInt(sentence.size()) + 1;
  System.out.println(SentenceUtils.listToString(sentence.subList(0, len), false, tagSeparator));
  if (fullSentence) {
   System.out.println(SentenceUtils.listToString(sentence, false, tagSeparator));
  }
 }
}

代码示例来源：origin: chrisbanes/cheesesquare

private List<String> getRandomSublist(String[] array, int amount) {
  ArrayList<String> list = new ArrayList<>(amount);
  Random random = new Random();
  while (list.size() < amount) {
    list.add(array[random.nextInt(array.length)]);
  }
  return list;
}

代码示例来源：origin: LitePalFramework/LitePal

private void saveAllByRandom() {
  List<LitePalSupport> modelList = getModelList();
  while (!modelList.isEmpty()) {
    Random rand = new Random();
    int index = rand.nextInt(modelList.size());
    LitePalSupport model = modelList.remove(index);
    model.save();
  }
}

代码示例来源：origin: springside/springside4

/**
   * 从输入list中随机返回随机个对象.
   */
  public static <T> List<T> randomSome(List<T> list) {
    int size = random.nextInt(list.size());
    if (size == 0) {
      size = 1;
    }
    return randomSome(list, size);
  }
}

代码示例来源：origin: alibaba/arthas

public void run() throws InterruptedException {
  try {
    int number = random.nextInt()/10000;
    List<Integer> primeFactors = primeFactors(number);
    print(number, primeFactors);
  } catch (Exception e) {
    System.out.println(String.format("illegalArgumentCount:%3d, ", illegalArgumentCount) + e.getMessage());
  }
}

代码示例来源：origin: apache/storm

public void execute(Tuple input, BasicOutputCollector collector) {
  total = total.add(new BigInteger(input.getValues().get(1).toString()));
  collector.emit(tuple(total.toString()));
  //prints the total with low probability.
  if(RANDOM.nextInt(1000) > 995) {
    LOG.info("Running total = " + total);
  }
}

代码示例来源：origin: neo4j/neo4j

@Test
public void shouldLoadProcedureFromJarWithSpacesInFilename() throws Throwable
{
  // Given
  URL jar = new JarBuilder().createJarFor( tmpdir.newFile( new Random().nextInt() + " some spaces in filename.jar" ),
      ClassWithOneProcedure.class);
  // When
  List<CallableProcedure> procedures = jarloader.loadProceduresFromDir( parentDir( jar ) ).procedures();
  // Then
  List<ProcedureSignature> signatures = procedures.stream().map( CallableProcedure::signature ).collect( toList() );
  assertThat( signatures,
      contains( procedureSignature( "org", "neo4j", "kernel", "impl", "proc", "myProcedure" ).out( "someNumber", NTInteger ).build() ) );
  assertThat( asList( procedures.get( 0 ).apply( new BasicContext(), new Object[0], resourceTracker ) ),
      contains( IsEqual.equalTo( new Object[]{1337L} ) ) );
}

代码示例来源：origin: apache/storm

/**
   * Creates a two task assignment by selecting random tasks.
   */
  public int[] createAssignment(List<Integer> tasks, byte[] key) {
    // It is necessary that this produce a deterministic assignment based on the key, so seed the Random from the key
    final long seedForRandom = Arrays.hashCode(key);
    final Random random = new Random(seedForRandom);
    final int choice1 = random.nextInt(tasks.size());
    int choice2 = random.nextInt(tasks.size());
    // ensure that choice1 and choice2 are not the same task
    choice2 = choice1 == choice2 ? (choice2 + 1) % tasks.size() : choice2;
    return new int[]{ tasks.get(choice1), tasks.get(choice2) };
  }
}

代码示例来源：origin: apache/incubator-druid

@Setup
public void setup()
{
 Random rand = ThreadLocalRandom.current();
 sequences = new ArrayList<>();
 for (int i = 0; i < count; i++) {
  int[] sequence = new int[sequenceLength];
  for (int j = 0; j < sequenceLength; j++) {
   sequence[j] = rand.nextInt();
  }
  sequences.add(Sequences.simple(Ints.asList(sequence)));
 }
}

代码示例来源：origin: ben-manes/caffeine

@Override Node select(List<Node> sample, Random random, long tick) {
  int victim = random.nextInt(sample.size());
  return sample.get(victim);
 }
},

代码示例来源：origin: google/guava

private static void runLeastOfComparison(int iterations, int elements, int seeds) {
 Random random = new Random(42);
 Ordering<Integer> ordering = Ordering.natural();
 for (int i = 0; i < iterations; i++) {
  List<Integer> list = Lists.newArrayList();
  for (int j = 0; j < elements; j++) {
   list.add(random.nextInt(10 * i + j + 1));
  }
  for (int seed = 1; seed < seeds; seed++) {
   int k = random.nextInt(10 * seed);
   assertEquals(ordering.sortedCopy(list).subList(0, k), ordering.leastOf(list, k));
  }
 }
}

代码示例来源：origin: stackoverflow.com

import java.util.Random;
 //...
 Random r = new Random();
 String alphabet = "123xyz";
 for (int i = 0; i < 50; i++) {
   System.out.println(alphabet.charAt(r.nextInt(alphabet.length())));
 } // prints 50 random characters from alphabet