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

TreeSet.isEmpty介绍

[英]Returns true if this TreeSet has no element, otherwise false.
[中]

代码示例

代码示例来源：origin: apache/incubator-druid

public boolean isEmpty()
{
 return holderSet.isEmpty();
}

代码示例来源：origin: apache/flink

@Override
public boolean isEmpty() {
  return treeSet.isEmpty();
}

代码示例来源：origin: google/ExoPlayer

/** Returns whether there are any spans cached. */
public boolean isEmpty() {
 return cachedSpans.isEmpty();
}

代码示例来源：origin: facebook/facebook-android-sdk

private synchronized void fetchAvailableVersions(boolean force) {
    if (force || availableVersions == null || availableVersions.isEmpty()) {
      availableVersions = fetchAllAvailableProtocolVersionsForAppInfo(this);
    }
  }
}

代码示例来源：origin: stanfordnlp/CoreNLP

@Override
public void display(boolean verbose, PrintWriter pw) {
 if (unkWords.isEmpty()) {
  pw.printf("UnknownWordPrinter: all words known by DVModel%n");
 } else {
  pw.printf("UnknownWordPrinter: the following words are unknown%n");
  for (String word : unkWords) {
   pw.printf("  %s%n", word);
  }
 }
}

代码示例来源：origin: apache/ignite

/**
 * @return Checks the minimum update counter task from queue.
 */
private Item peek() {
  return queue.isEmpty() ? null : queue.first();
}

代码示例来源：origin: google/ExoPlayer

private void evictCache(Cache cache, long requiredSpace) {
 while (currentSize + requiredSpace > maxBytes && !leastRecentlyUsed.isEmpty()) {
  try {
   cache.removeSpan(leastRecentlyUsed.first());
  } catch (CacheException e) {
   // do nothing.
  }
 }
}

代码示例来源：origin: wdullaer/MaterialDateTimePicker

@Override
public int getMaxYear() {
  if (!selectableDays.isEmpty()) return selectableDays.last().get(Calendar.YEAR);
  // Ensure no years can be selected outside of the given maximum date
  return mMaxDate != null && mMaxDate.get(Calendar.YEAR) < mMaxYear ? mMaxDate.get(Calendar.YEAR) : mMaxYear;
}

代码示例来源：origin: apache/storm

public synchronized FileOffset getCommitPosition() {
  if (!offsets.isEmpty()) {
    return offsets.first().clone();
  }
  return null;
}

代码示例来源：origin: wdullaer/MaterialDateTimePicker

@Override
public int getMinYear() {
  if (!selectableDays.isEmpty()) return selectableDays.first().get(Calendar.YEAR);
  // Ensure no years can be selected outside of the given minimum date
  return mMinDate != null && mMinDate.get(Calendar.YEAR) > mMinYear ? mMinDate.get(Calendar.YEAR) : mMinYear;
}

代码示例来源：origin: apache/storm

public TopologyDetails getRunningTopologyWithLowestPriority(ISchedulingState cluster) {
  TreeSet<TopologyDetails> queue = getRunningTopologies(cluster);
  if (queue.isEmpty()) {
    return null;
  }
  return queue.last();
}

代码示例来源：origin: apache/incubator-druid

public PartitionChunk<T> remove(PartitionChunk<T> chunk)
{
 if (!holderSet.isEmpty()) {
  // Somewhat funky implementation in order to return the removed object as it exists in the set
  SortedSet<PartitionChunk<T>> tailSet = holderSet.tailSet(chunk, true);
  if (!tailSet.isEmpty()) {
   PartitionChunk<T> element = tailSet.first();
   if (chunk.equals(element)) {
    holderSet.remove(element);
    return element;
   }
  }
 }
 return null;
}

代码示例来源：origin: apache/storm

public boolean hasTopologyNeedSchedule(ISchedulingState cluster) {
  return (!this.getPendingTopologies(cluster).isEmpty());
}

代码示例来源：origin: apache/hbase

@Override
public ReturnCode filterCell(final Cell c) {
 if (sortedPrefixes.isEmpty()) {
  return ReturnCode.INCLUDE;
 } else {
  return filterColumn(c);
 }
}

代码示例来源：origin: facebook/facebook-android-sdk

public TreeSet<Integer> getAvailableVersions() {
  if (availableVersions == null || availableVersions.isEmpty()) {
    fetchAvailableVersions(false);
  }
  return availableVersions;
}

代码示例来源：origin: wdullaer/MaterialDateTimePicker

@Override
public @NonNull Calendar getStartDate() {
  if (!selectableDays.isEmpty()) return (Calendar) selectableDays.first().clone();
  if (mMinDate != null) return (Calendar) mMinDate.clone();
  TimeZone timeZone = mController == null ? TimeZone.getDefault() : mController.getTimeZone();
  Calendar output = Calendar.getInstance(timeZone);
  output.set(Calendar.YEAR, mMinYear);
  output.set(Calendar.DAY_OF_MONTH, 1);
  output.set(Calendar.MONTH, Calendar.JANUARY);
  return output;
}

代码示例来源：origin: gocd/gocd

private void removeCurrentLatestIfNoLongerActive(Stage stage, TreeSet<Long> ids) {
  if (!ids.isEmpty()) {
    if (isNewerThanCurrentLatest(stage, ids) && isCurrentLatestInactive(ids)) {
      ids.remove(ids.last());
    }
  }
}

代码示例来源：origin: apache/storm

@Override
public EventDataWrap receive() {
  if (pending.size() >= config.getMaxPendingMsgsPerPartition()) {
    return null;
  }
  EventDataWrap eventDatawrap;
  if (toResend.isEmpty()) {
    eventDatawrap = receiver.receive();
  } else {
    eventDatawrap = toResend.pollFirst();
  }
  if (eventDatawrap != null) {
    lastOffset = eventDatawrap.getMessageId().getOffset();
    pending.put(lastOffset, eventDatawrap);
  }
  return eventDatawrap;
}

代码示例来源：origin: google/guava

public void testNewTreeSetEmptyNonGeneric() {
 TreeSet<LegacyComparable> set = Sets.newTreeSet();
 assertTrue(set.isEmpty());
 set.add(new LegacyComparable("foo"));
 set.add(new LegacyComparable("bar"));
 assertThat(set)
   .containsExactly(new LegacyComparable("bar"), new LegacyComparable("foo"))
   .inOrder();
}

代码示例来源：origin: google/guava

public void testNewTreeSetEmptyDerived() {
 TreeSet<Derived> set = Sets.newTreeSet();
 assertTrue(set.isEmpty());
 set.add(new Derived("foo"));
 set.add(new Derived("bar"));
 assertThat(set).containsExactly(new Derived("bar"), new Derived("foo")).inOrder();
}