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

Multimap.isEmpty介绍

[英]Returns true if this multimap contains no key-value pairs. Equivalent to size(), but can in some cases be more efficient.
[中]如果此多重映射不包含键值对，则返回true。相当于size（），但在某些情况下效率更高。

代码示例

代码示例来源：origin: google/guava

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

代码示例来源：origin: google/guava

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

代码示例来源：origin: google/guava

static void assertEmpty(Multimap<?, ?> multimap) {
  if (!multimap.isEmpty()) {
   fail("Not true that " + multimap + " is empty");
  }
 }
}

代码示例来源：origin: google/guava

@Override
public boolean isEmpty() {
 synchronized (mutex) {
  return delegate().isEmpty();
 }
}

代码示例来源：origin: google/guava

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

代码示例来源：origin: google/guava

private static <K, V> ImmutableSetMultimap<K, V> copyOf(
  Multimap<? extends K, ? extends V> multimap, Comparator<? super V> valueComparator) {
 checkNotNull(multimap); // eager for GWT
 if (multimap.isEmpty() && valueComparator == null) {
  return of();
 }
 if (multimap instanceof ImmutableSetMultimap) {
  @SuppressWarnings("unchecked") // safe since multimap is not writable
  ImmutableSetMultimap<K, V> kvMultimap = (ImmutableSetMultimap<K, V>) multimap;
  if (!kvMultimap.isPartialView()) {
   return kvMultimap;
  }
 }
 return fromMapEntries(multimap.asMap().entrySet(), valueComparator);
}

代码示例来源：origin: google/guava

@CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
 @CollectionSize.Require(ONE)
 public void testValuesIteratorRemove() {
  Iterator<V> valuesItr = multimap().values().iterator();
  valuesItr.next();
  valuesItr.remove();
  assertTrue(multimap().isEmpty());
 }
}

代码示例来源：origin: google/guava

@CollectionSize.Require(ZERO)
public void testIsEmptyYes() {
 assertTrue(multimap().isEmpty());
}

代码示例来源：origin: google/guava

@CollectionSize.Require(absent = ZERO)
public void testIsEmptyNo() {
 assertFalse(multimap().isEmpty());
}

代码示例来源：origin: google/guava

protected void assertGet(K key, Collection<V> values) {
 assertEqualIgnoringOrder(values, multimap().get(key));
 if (!values.isEmpty()) {
  assertEqualIgnoringOrder(values, multimap().asMap().get(key));
  assertFalse(multimap().isEmpty());
 } else {
  assertNull(multimap().asMap().get(key));
 }
 assertEquals(values.size(), multimap().get(key).size());
 assertEquals(values.size() > 0, multimap().containsKey(key));
 assertEquals(values.size() > 0, multimap().keySet().contains(key));
 assertEquals(values.size() > 0, multimap().keys().contains(key));
}

代码示例来源：origin: google/guava

@CollectionSize.Require(ONE)
@CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
public void testIteratorRemovePropagatesToMultimap() {
 Iterator<Entry<K, V>> iterator = multimap().entries().iterator();
 assertEquals(Helpers.mapEntry(k0(), v0()), iterator.next());
 iterator.remove();
 assertTrue(multimap().isEmpty());
}

代码示例来源：origin: google/guava

@CollectionSize.Require(SEVERAL)
 @CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
 public void testAsMapEntrySetIteratorRemovePropagatesToMultimap() {
  resetContainer(Helpers.mapEntry(k0(), v0()), Helpers.mapEntry(k0(), v3()));
  Set<Entry<K, Collection<V>>> asMapEntrySet = multimap().asMap().entrySet();
  Iterator<Entry<K, Collection<V>>> asMapEntryItr = asMapEntrySet.iterator();
  asMapEntryItr.next();
  asMapEntryItr.remove();
  assertTrue(multimap().isEmpty());
 }
}

代码示例来源：origin: google/guava

@CollectionSize.Require(ONE)
@CollectionFeature.Require(SUPPORTS_ITERATOR_REMOVE)
public void testKeysEntrySetIteratorRemove() {
 Multiset<K> keys = multimap().keys();
 Iterator<Multiset.Entry<K>> itr = keys.entrySet().iterator();
 assertEquals(Multisets.immutableEntry(k0(), 1), itr.next());
 itr.remove();
 assertTrue(multimap().isEmpty());
}

代码示例来源：origin: google/guava

@MapFeature.Require(SUPPORTS_PUT)
public void testPutAllIntoEmpty() {
 Multimap<K, V> target = getSubjectGenerator().create();
 assertEquals(!multimap().isEmpty(), target.putAll(multimap()));
 assertEquals(multimap(), target);
}

代码示例来源：origin: google/guava

@CollectionSize.Require(absent = ZERO)
@MapFeature.Require(ALLOWS_NULL_VALUES)
public void testSizeNullValue() {
 initMultimapWithNullValue();
 assertEquals(getNumElements(), multimap().size());
 assertFalse(multimap().isEmpty());
}

代码示例来源：origin: google/guava

@CollectionSize.Require(absent = ZERO)
@MapFeature.Require(ALLOWS_NULL_KEYS)
public void testSizeNullKey() {
 initMultimapWithNullKey();
 assertEquals(getNumElements(), multimap().size());
 assertFalse(multimap().isEmpty());
}

代码示例来源：origin: google/guava

@CollectionSize.Require(absent = ZERO)
@MapFeature.Require({ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES})
public void testSizeNullKeyAndValue() {
 initMultimapWithNullKeyAndValue();
 assertEquals(getNumElements(), multimap().size());
 assertFalse(multimap().isEmpty());
}

代码示例来源：origin: google/guava

public void testInvertFrom() {
 ImmutableMultimap<Integer, String> empty = ImmutableMultimap.of();
 // typical usage example - sad that ArrayListMultimap.create() won't work
 Multimap<String, Integer> multimap =
   Multimaps.invertFrom(empty, ArrayListMultimap.<String, Integer>create());
 assertTrue(multimap.isEmpty());
 ImmutableMultimap<Integer, String> single =
   new ImmutableMultimap.Builder<Integer, String>().put(1, "one").put(2, "two").build();
 // copy into existing multimap
 assertSame(multimap, Multimaps.invertFrom(single, multimap));
 ImmutableMultimap<String, Integer> expected =
   new ImmutableMultimap.Builder<String, Integer>().put("one", 1).put("two", 2).build();
 assertEquals(expected, multimap);
}

代码示例来源：origin: google/guava

public void testMultimapReads() {
 Multimap<String, Integer> multimap = createMultimap();
 assertTrue(multimap.containsKey("foo"));
 assertFalse(multimap.containsKey("cat"));
 assertTrue(multimap.containsValue(1));
 assertFalse(multimap.containsValue(5));
 assertTrue(multimap.containsEntry("foo", 1));
 assertFalse(multimap.containsEntry("cat", 1));
 assertFalse(multimap.containsEntry("foo", 5));
 assertFalse(multimap.entries().isEmpty());
 assertEquals(3, multimap.size());
 assertFalse(multimap.isEmpty());
 assertEquals("{foo=[1, 3], bar=[2]}", multimap.toString());
}

代码示例来源：origin: google/guava

public void testMultimapReads() {
 Multimap<String, Integer> multimap = createMultimap();
 assertTrue(multimap.containsKey("foo"));
 assertFalse(multimap.containsKey("cat"));
 assertTrue(multimap.containsValue(1));
 assertFalse(multimap.containsValue(5));
 assertTrue(multimap.containsEntry("foo", 1));
 assertFalse(multimap.containsEntry("cat", 1));
 assertFalse(multimap.containsEntry("foo", 5));
 assertFalse(multimap.entries().isEmpty());
 assertEquals(3, multimap.size());
 assertFalse(multimap.isEmpty());
 assertEquals("{foo=[1, 3], bar=[2]}", multimap.toString());
}