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

Set.toArray介绍

[英]Returns an array containing all elements contained in this set.
[中]返回包含此集合中包含的所有元素的数组。

代码示例

代码示例来源：origin: spring-projects/spring-framework

public String[] getAttributeNames() {
  return this.attributes.keySet().toArray(new String[0]);
}

代码示例来源：origin: libgdx/libgdx

public Class[] getInterfaces() {
  return interfaces.toArray(new Class[this.interfaces.size()]);
}

代码示例来源：origin: spring-projects/spring-framework

public static Method[] getPropertyMethods(PropertyDescriptor[] properties, boolean read, boolean write) {
  Set methods = new HashSet();
  for (int i = 0; i < properties.length; i++) {
    PropertyDescriptor pd = properties[i];
    if (read) {
      methods.add(pd.getReadMethod());
    }
    if (write) {
      methods.add(pd.getWriteMethod());
    }
  }
  methods.remove(null);
  return (Method[]) methods.toArray(new Method[methods.size()]);
}

代码示例来源：origin: google/j2objc

public AddPropertyTransformer(Map props) {
  int size = props.size();
  names = (String[])props.keySet().toArray(new String[size]);
  types = new Type[size];
  for (int i = 0; i < size; i++) {
    types[i] = (Type)props.get(names[i]);
  }
}

代码示例来源：origin: google/guava

@Override
 TypeVariable<?> captureAsTypeVariable(Type[] upperBounds) {
  Set<Type> combined = new LinkedHashSet<>(asList(upperBounds));
  // Since this is an artifically generated type variable, we don't bother checking
  // subtyping between declared type bound and actual type bound. So it's possible that we
  // may generate something like <capture#1-of ? extends Foo&SubFoo>.
  // Checking subtype between declared and actual type bounds
  // adds recursive isSubtypeOf() call and feels complicated.
  // There is no contract one way or another as long as isSubtypeOf() works as expected.
  combined.addAll(asList(typeParam.getBounds()));
  if (combined.size() > 1) { // Object is implicit and only useful if it's the only bound.
   combined.remove(Object.class);
  }
  return super.captureAsTypeVariable(combined.toArray(new Type[0]));
 }
};

代码示例来源：origin: robolectric/robolectric

@Implementation
protected @Nullable String[] getPackagesForUid(int uid) {
 String[] packageNames = packagesForUid.get(uid);
 if (packageNames != null) {
  return packageNames;
 }
 Set<String> results = new HashSet<>();
 for (PackageInfo packageInfo : packageInfos.values()) {
  if (packageInfo.applicationInfo != null && packageInfo.applicationInfo.uid == uid) {
   results.add(packageInfo.packageName);
  }
 }
 return results.isEmpty() ? null : results.toArray(new String[results.size()]);
}

代码示例来源：origin: google/guava

Set<K> keySet = map.keySet();
Collection<V> valueCollection = map.values();
Set<Entry<K, V>> entrySet = map.entrySet();
 V value = map.get(key);
 expectedKeySetHash += key != null ? key.hashCode() : 0;
 assertTrue(map.containsKey(key));
assertEquals(map.size(), valueCollection.size());
assertEquals(valueCollection.size() == 0, valueCollection.isEmpty());
assertEquals(!valueCollection.isEmpty(), valueCollection.iterator().hasNext());
Object[] entrySetToArray1 = entrySet.toArray();
assertEquals(map.size(), entrySetToArray1.length);
assertTrue(Arrays.asList(entrySetToArray1).containsAll(entrySet));
Entry<?, ?>[] entrySetToArray2 = new Entry<?, ?>[map.size() + 2];
entrySetToArray2[map.size()] = mapEntry("foo", 1);
assertSame(entrySetToArray2, entrySet.toArray(entrySetToArray2));
assertNull(entrySetToArray2[map.size()]);
assertTrue(Arrays.asList(entrySetToArray2).containsAll(entrySet));
assertEquals(map.size(), valuesToArray1.length);
assertTrue(Arrays.asList(valuesToArray1).containsAll(valueCollection));
Object[] valuesToArray2 = new Object[map.size() + 2];

代码示例来源：origin: robolectric/robolectric

@Override
public int getAvailableRestoreSets(IRestoreObserver observer, IBackupManagerMonitor monitor)
  throws RemoteException {
 post(
   () -> {
    Set<Long> restoreTokens = serviceState.restoreData.keySet();
    Set<RestoreSet> restoreSets = new HashSet<>();
    for (long token : restoreTokens) {
     restoreSets.add(new RestoreSet("RestoreSet-" + token, "device", token));
    }
    observer.restoreSetsAvailable(restoreSets.toArray(new RestoreSet[restoreSets.size()]));
   });
 return BackupManager.SUCCESS;
}

代码示例来源：origin: apache/flink

/**
 * Returns the names of all registered column families.
 *
 * @return The names of all registered column families.
 */
String[] getFamilyNames() {
  return this.familyMap.keySet().toArray(new String[this.familyMap.size()]);
}

代码示例来源：origin: jfinal/jfinal

/**
 * Return attribute names of this model.
 */
public String[] _getAttrNames() {
  Set<String> attrNameSet = attrs.keySet();
  return attrNameSet.toArray(new String[attrNameSet.size()]);
}

代码示例来源：origin: jMonkeyEngine/jmonkeyengine

public void print(){
  System.out.println("-----------------");
  Set<Integer> keys = objs.keySet();
  Integer[] keysArr = keys.toArray(new Integer[0]);
  Arrays.sort(keysArr);
  for (int i = 0; i < keysArr.length; i++){
    System.out.println(keysArr[i]+" => "+objs.get(keysArr[i]).hashCode());
  }
}

代码示例来源：origin: stanfordnlp/CoreNLP

/**
 * dump the {@code <x,y>} pairs it computed found
 */
public void dumpMemory() {
 Double[] keys = memory.keySet().toArray(new Double[memory.keySet().size()]);
 Arrays.sort(keys);
 for (Double key : keys) {
  log.info(key + "\t" + memory.get(key));
 }
}

代码示例来源：origin: ben-manes/caffeine

@CheckNoWriter @CheckNoStats
@Test(dataProvider = "caches")
@CacheSpec(removalListener = { Listener.DEFAULT, Listener.REJECTING })
public void keySetToArray(Map<Integer, Integer> map, CacheContext context) {
 int length = context.original().size();
 Integer[] ints = map.keySet().toArray(new Integer[length]);
 assertThat(ints.length, is(length));
 assertThat(Arrays.asList(ints).containsAll(context.original().keySet()), is(true));
 Object[] array = map.keySet().toArray();
 assertThat(array.length, is(length));
 assertThat(Arrays.asList(array).containsAll(context.original().keySet()), is(true));
}

代码示例来源：origin: google/guava

/**
 * Returns a new proxy for {@code interfaceType}. Proxies of the same interface are equal to each
 * other if the {@link DummyProxy} instance that created the proxies are equal.
 */
final <T> T newProxy(TypeToken<T> interfaceType) {
 Set<Class<?>> interfaceClasses = Sets.newLinkedHashSet();
 interfaceClasses.addAll(interfaceType.getTypes().interfaces().rawTypes());
 // Make the proxy serializable to work with SerializableTester
 interfaceClasses.add(Serializable.class);
 Object dummy =
   Proxy.newProxyInstance(
     interfaceClasses.iterator().next().getClassLoader(),
     interfaceClasses.toArray(new Class<?>[interfaceClasses.size()]),
     new DummyHandler(interfaceType));
 @SuppressWarnings("unchecked") // interfaceType is T
 T result = (T) dummy;
 return result;
}

代码示例来源：origin: ctripcorp/apollo

@Override
public String[] getPropertyNames() {
 Set<String> propertyNames = this.source.getPropertyNames();
 if (propertyNames.isEmpty()) {
  return EMPTY_ARRAY;
 }
 return propertyNames.toArray(new String[propertyNames.size()]);
}

代码示例来源：origin: javax.activation/activation

/**
 * Return all the MIME types known to this mailcap file.
 */
public String[] getMimeTypes() {
Set types = new HashSet(type_hash.keySet());
types.addAll(fallback_hash.keySet());
types.addAll(native_commands.keySet());
String[] mts = new String[types.size()];
mts = (String[])types.toArray(mts);
return mts;
}

代码示例来源：origin: apache/nifi

private static URL[] combineURLs(final Set<URL> instanceUrls, final Set<URL> additionalResourceUrls) {
  final Set<URL> allUrls = new LinkedHashSet<>();
  if (instanceUrls != null) {
    allUrls.addAll(instanceUrls);
  }
  if (additionalResourceUrls != null) {
    allUrls.addAll(additionalResourceUrls);
  }
  return allUrls.toArray(new URL[allUrls.size()]);
}

代码示例来源：origin: stackoverflow.com

Set<Integer> s1 = new HashSet<Integer>(Arrays.asList(array1));
Set<Integer> s2 = new HashSet<Integer>(Arrays.asList(array2));
s1.retainAll(s2);

Integer[] result = s1.toArray(new Integer[s1.size()]);

代码示例来源：origin: spring-projects/spring-security-oauth

protected OAuth2Authentication getOAuth2Authentication(ClientDetails client, TokenRequest tokenRequest) {
    Map<String, String> params = tokenRequest.getRequestParameters();
    String username = params.containsKey("username") ? params.get("username") : "guest";
    List<GrantedAuthority> authorities = params.containsKey("authorities") ? AuthorityUtils
        .createAuthorityList(OAuth2Utils.parseParameterList(params.get("authorities")).toArray(new String[0]))
        : AuthorityUtils.NO_AUTHORITIES;
    Authentication user = new UsernamePasswordAuthenticationToken(username, "N/A", authorities);
    OAuth2Authentication authentication = new OAuth2Authentication(tokenRequest.createOAuth2Request(client), user);
    return authentication;
  }
}

代码示例来源：origin: ben-manes/caffeine

@CheckNoWriter @CheckNoStats
@Test(dataProvider = "caches")
@CacheSpec(removalListener = { Listener.DEFAULT, Listener.REJECTING })
public void entriesToArray(Map<Integer, Integer> map, CacheContext context) {
 int length = context.original().size();
 Object[] ints = map.entrySet().toArray(new Object[length]);
 assertThat(ints.length, is(length));
 assertThat(Arrays.asList(ints).containsAll(context.original().entrySet()), is(true));
 Object[] array = map.entrySet().toArray();
 assertThat(array.length, is(length));
 assertThat(Arrays.asList(array).containsAll(context.original().entrySet()), is(true));
}