本文整理了Java中java.util.Collections.nCopies()方法的一些代码示例，展示了Collections.nCopies()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。Collections.nCopies()方法的具体详情如下：
包路径：java.util.Collections
类名称：Collections
方法名：nCopies

Collections.nCopies介绍

[英]Returns a list containing the specified number of the specified element. The list cannot be modified. The list is serializable.
[中]返回包含指定元素的指定编号的列表。无法修改该列表。列表是可序列化的。

代码示例

代码示例来源：origin: graphhopper/graphhopper

/**
 * Set routing request
 * <p>
 *
 * @param points List of stopover points in order: start, 1st stop, 2nd stop, ..., end
 */
public GHRequest(List<GHPoint> points) {
  this(points, Collections.nCopies(points.size(), Double.NaN));
}

代码示例来源：origin: konsoletyper/teavm

AllFunction(int count) {
  this.result = result;
  this.count = count;
  list.addAll(Collections.nCopies(count, null));
}

代码示例来源：origin: apache/hbase

@Override
public void addFilterLists(List<Filter> filters) {
 if (checkAndGetReversed(filters, isReversed()) != isReversed()) {
  throw new IllegalArgumentException("Filters in the list must have the same reversed flag");
 }
 this.filters.addAll(filters);
 this.subFiltersIncludedCell.addAll(Collections.nCopies(filters.size(), false));
 this.prevFilterRCList.addAll(Collections.nCopies(filters.size(), null));
 this.prevCellList.addAll(Collections.nCopies(filters.size(), null));
}

代码示例来源：origin: konsoletyper/teavm

private int union(int a, int b) {
  Wrapper p = wrappers.get(set.find(a));
  Wrapper q = wrappers.get(set.find(b));
  int c = set.union(a, b);
  if (c >= wrappers.size()) {
    wrappers.addAll(Collections.nCopies(c - wrappers.size() + 1, null));
  }
  wrappers.set(c, union(p, q));
  return c;
}

代码示例来源：origin: konsoletyper/teavm

private FieldReference[][] packFields(List<Set<FieldReference>> fields) {
  List<Set<FieldReference>> joinedFields = new ArrayList<>(Collections.nCopies(fields.size(), null));
  for (int i = 0; i < fields.size(); ++i) {
    if (fields.get(i) == null) {
      continue;
    }
    int j = definitionClasses[i];
    Set<FieldReference> fieldSet = joinedFields.get(j);
    if (fieldSet == null) {
      fieldSet = new LinkedHashSet<>();
      joinedFields.set(j, fieldSet);
    }
    fieldSet.addAll(fields.get(i));
  }
  FieldReference[][] packedFields = new FieldReference[fields.size()][];
  for (int i = 0; i < packedFields.length; ++i) {
    if (joinedFields.get(i) != null) {
      packedFields[i] = joinedFields.get(i).toArray(new FieldReference[0]);
    }
  }
  return packedFields;
}

代码示例来源：origin: prestodb/presto

singleValues.add(range.getLow().getValue());
      switch (range.getLow().getBound()) {
        case ABOVE:
          rangeConjuncts.add(toPredicate(columnName, ">", range.getLow().getValue(), type, accumulator));
          break;
        case EXACTLY:
          rangeConjuncts.add(toPredicate(columnName, ">=", range.getLow().getValue(), type, accumulator));
          break;
        case BELOW:
if (singleValues.size() == 1) {
  disjuncts.add(toPredicate(columnName, "=", getOnlyElement(singleValues), type, accumulator));
else if (singleValues.size() > 1) {
  for (Object value : singleValues) {
    bindValue(value, type, accumulator);
  String values = Joiner.on(",").join(nCopies(singleValues.size(), "?"));
  disjuncts.add(quote(columnName) + " IN (" + values + ")");

代码示例来源：origin: prestodb/presto

protected void setup(int numSortChannels, int totalChannels, int numMergeSources, int pagesCount)
{
  types = nCopies(totalChannels, BIGINT);
  sortChannels = new ArrayList<>();
  for (int i = 0; i < numSortChannels; i++) {
    sortChannels.add(i);
  }
  sortTypes = nCopies(numSortChannels, BIGINT);
  sortOrders = nCopies(numSortChannels, ASC_NULLS_FIRST);
  outputChannels = new ArrayList<>();
  for (int i = 0; i < totalChannels; i++) {
    outputChannels.add(i);
  }
  createPages(totalChannels, pagesCount);
  createPageProducers(numMergeSources);
}

代码示例来源：origin: konsoletyper/teavm

private void prepare(MethodNode method) {
  InsnList instructions = method.instructions;
  minLocal = 0;
  if ((method.access & Opcodes.ACC_STATIC) != 0) {
    minLocal = 1;
  }
  labelIndexes = new HashMap<>();
  lineNumbers = new HashMap<>();
  for (int i = 0; i < instructions.size(); ++i) {
    AbstractInsnNode node = instructions.get(i);
    if (node instanceof LabelNode) {
      labelIndexes.put(((LabelNode) node).getLabel(), i);
    }
    if (node instanceof LineNumberNode) {
      LineNumberNode lineNumberNode = (LineNumberNode) node;
      lineNumbers.put(lineNumberNode.start.getLabel(), lineNumberNode.line);
    }
  }
  for (LocalVariableNode localVar : method.localVariables) {
    int location = labelIndexes.get(localVar.start.getLabel());
    localVariableMap.computeIfAbsent(location, k -> new ArrayList<>()).add(localVar);
  }
  targetInstructions = new ArrayList<>(instructions.size());
  targetInstructions.addAll(Collections.nCopies(instructions.size(), null));
  basicBlocks.addAll(Collections.nCopies(instructions.size(), null));
  stackBefore = new StackFrame[instructions.size()];
  stackAfter = new StackFrame[instructions.size()];
}

代码示例来源：origin: konsoletyper/teavm

private void dfs(Graph graph, Program program) {
  startLocations = new ArrayList<>(Collections.nCopies(graph.size(), null));
  additionalConnections = new ArrayList<>();
  Deque<Step> stack = new ArrayDeque<>();
    if (visited[step.block]) {
      if (step.location != null) {
        additionalConnections.add(new AdditionalConnection(step.location, startLocations.get(step.block)));

代码示例来源：origin: konsoletyper/teavm

private List<Set<Phi>> getDestinationPhis(Program program) {
  List<Set<Phi>> destinationPhis = new ArrayList<>();
  destinationPhis.addAll(Collections.nCopies(program.variableCount(), null));
  for (int i = 0; i < program.basicBlockCount(); ++i) {
    BasicBlock block = program.basicBlockAt(i);
    for (Phi phi : block.getPhis()) {
      for (Incoming incoming : phi.getIncomings()) {
        Set<Phi> phis = destinationPhis.get(incoming.getValue().getIndex());
        if (phis == null) {
          phis = new LinkedHashSet<>();
          destinationPhis.set(incoming.getValue().getIndex(), phis);
        }
        phis.add(phi);
      }
    }
  }
  return destinationPhis;
}

代码示例来源：origin: google/guava

public void testDirectExecutorServiceInvokeAll() throws Exception {
 final ExecutorService executor = newDirectExecutorService();
 final ThreadLocal<Integer> threadLocalCount =
   new ThreadLocal<Integer>() {
    @Override
    protected Integer initialValue() {
     return 0;
    }
   };
 final Callable<Integer> incrementTask =
   new Callable<Integer>() {
    @Override
    public Integer call() {
     int i = threadLocalCount.get();
     threadLocalCount.set(i + 1);
     return i;
    }
   };
 List<Future<Integer>> futures = executor.invokeAll(Collections.nCopies(10, incrementTask));
 for (int i = 0; i < 10; i++) {
  Future<Integer> future = futures.get(i);
  assertTrue("Task should have been run before being returned", future.isDone());
  assertEquals(i, future.get().intValue());
 }
 assertEquals(10, threadLocalCount.get().intValue());
}

代码示例来源：origin: konsoletyper/teavm

public void addEdge(int from, int to) {
  if (to < 0 || from < 0) {
    throw new IllegalArgumentException();
  }
  sz = Math.max(sz, Math.max(from, to) + 1);
  builtGraph = null;
  if (addedEdges.size() == from) {
    addedEdges.add(IntHashSet.from(to));
  } else if (addedEdges.size() <= from) {
    addedEdges.addAll(Collections.nCopies(from - addedEdges.size(), null));
    addedEdges.add(IntHashSet.from(to));
  } else {
    IntSet set = addedEdges.get(from);
    if (set == null) {
      addedEdges.set(from, IntHashSet.from(to));
    } else {
      set.add(to);
    }
  }
}

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

public SimpleKafkaSpecConsumer(Config config, Optional<Logger> log) {
 // Consumer
 String kafkaConsumerClientClass = ConfigUtils.getString(config, CONSUMER_CLIENT_FACTORY_CLASS_KEY,
   DEFAULT_CONSUMER_CLIENT_FACTORY_CLASS);
 try {
  Class<?> clientFactoryClass = (Class<?>) Class.forName(kafkaConsumerClientClass);
  final GobblinKafkaConsumerClient.GobblinKafkaConsumerClientFactory factory =
    (GobblinKafkaConsumerClient.GobblinKafkaConsumerClientFactory)
      ConstructorUtils.invokeConstructor(clientFactoryClass);
  _kafkaConsumer = factory.create(config);
 } catch (ClassNotFoundException | NoSuchMethodException | IllegalAccessException | InstantiationException | InvocationTargetException e) {
  if (log.isPresent()) {
   log.get().error("Failed to instantiate Kafka consumer from class " + kafkaConsumerClientClass, e);
  }
  throw new RuntimeException("Failed to instantiate Kafka consumer", e);
 }
 List<KafkaTopic> kafkaTopics = _kafkaConsumer.getFilteredTopics(Collections.EMPTY_LIST,
   Lists.newArrayList(Pattern.compile(config.getString(SimpleKafkaSpecExecutor.SPEC_KAFKA_TOPICS_KEY))));
 _partitions = kafkaTopics.get(0).getPartitions();
 _lowWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));
 _nextWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));
 _highWatermark = Lists.newArrayList(Collections.nCopies(_partitions.size(), 0L));
 InputStream dummyInputStream = new ByteArrayInputStream(new byte[0]);
 _decoder = DecoderFactory.get().binaryDecoder(dummyInputStream, null);
 _reader = new SpecificDatumReader<AvroJobSpec>(AvroJobSpec.SCHEMA$);
 _versionWriter = new FixedSchemaVersionWriter();
}

代码示例来源：origin: apache/hive

partitionNames = new ArrayList<>(partitions.size());
 for (Partition partition : partitions) {
   partitionNames.add(Warehouse.makePartName(tbl.getPartitionKeys(), partition.getValues()));
response.setPartitionValues(new ArrayList<>(partitionNames.size()));
LOG.info("Converting responses to Partition values for items: {}", partitionNames.size());
for (String partName : partitionNames) {
 ArrayList<String> vals = new ArrayList<String>(Collections.nCopies(tbl.getPartitionKeys().size(), null));
 PartitionValuesRow row = new PartitionValuesRow();
 Warehouse.makeValsFromName(partName, vals);

代码示例来源：origin: apache/flink

public List<List<String>> getFieldOrigins(SqlNode sqlQuery) {
  if (sqlQuery instanceof SqlExplain) {
    return Collections.emptyList();
  }
  final RelDataType rowType = getValidatedNodeType(sqlQuery);
  final int fieldCount = rowType.getFieldCount();
  if (!sqlQuery.isA(SqlKind.QUERY)) {
    return Collections.nCopies(fieldCount, null);
  }
  final List<List<String>> list = new ArrayList<>();
  for (int i = 0; i < fieldCount; i++) {
    list.add(getFieldOrigin(sqlQuery, i));
  }
  return ImmutableNullableList.copyOf(list);
}

代码示例来源：origin: commons-collections/commons-collections

/**
 * Decorate the set method to perform the growth behaviour.
 * <p>
 * If the requested index is greater than the current size, the list will
 * grow to the new size. Indices between the old size and the requested
 * size will be filled with <code>null</code>.
 * <p>
 * If the index is less than the current size, the value will be set onto
 * the underlying list directly.
 * If the index is less than zero, the underlying list is called, which
 * will probably throw an IndexOutOfBoundsException.
 *
 * @param index  the index to set
 * @param element  the object to set at the specified index
 * @return the object previously at that index
 * @throws UnsupportedOperationException if the underlying list doesn't implement set
 * @throws ClassCastException if the underlying list rejects the element
 * @throws IllegalArgumentException if the underlying list rejects the element
 */
public Object set(int index, Object element) {
  int size = getList().size();
  if (index >= size) {
    getList().addAll(Collections.nCopies((index - size) + 1, null));
  }
  return getList().set(index, element);
}

代码示例来源：origin: apache/hbase

public FilterListWithAND(List<Filter> filters) {
 super(filters);
 // For FilterList with AND, when call FL's transformCell(), we should transform cell for all
 // sub-filters (because all sub-filters return INCLUDE*). So here, fill this array with true. we
 // keep this in FilterListWithAND for abstracting the transformCell() in FilterListBase.
 subFiltersIncludedCell = new ArrayList<>(Collections.nCopies(filters.size(), true));
}

代码示例来源：origin: konsoletyper/teavm

variableToSourceMap.add(-1);
definedVersions.addAll(Collections.nCopies(program.variableCount(), null));
  synthesizedPhisByBlock.add(new ArrayList<>());

代码示例来源：origin: apache/ignite

null;
List<DatasetTrainer<? extends IgniteModel, L>> trainers = Collections.nCopies(ensembleSize, tr);
  .mapToObj(mdlIdx -> {
    AdaptableDatasetTrainer<Vector, Double, Vector, Double, ? extends IgniteModel, L> tr =
      AdaptableDatasetTrainer.of(trainers.get(mdlIdx));
    if (mappings != null) {
      tr = tr.afterFeatureExtractor(featureValues -> {
        int[] mapping = mappings.get(mdlIdx);
        double[] newFeaturesValues = new double[mapping.length];
        for (int j = 0; j < mapping.length; j++)
      }).beforeTrainedModel(VectorUtils.getProjector(mappings.get(mdlIdx)));

代码示例来源：origin: konsoletyper/teavm

public GraphBuilder(int sz) {
  addedEdges.addAll(Collections.nCopies(sz, null));
  this.sz = sz;
}