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

Deque.removeFirst介绍

[英]Retrieves and removes the first element of this deque. This method differs from #pollFirst only in that it throws an exception if this deque is empty.
[中]检索并删除此数据块的第一个元素。此方法与#pollFirst的不同之处在于，如果此deque为空，则会引发异常。

代码示例

代码示例来源：origin: square/okhttp

@Override public List<Cookie> loadForRequest(HttpUrl url) {
  if (requestCookies.isEmpty()) return Collections.emptyList();
  return requestCookies.removeFirst();
 }
}

代码示例来源：origin: google/guava

create().equals(new ArrayDeque<>(ImmutableList.of("foo")));
create().hashCode();
create().isEmpty();
create().iterator();
create().remove("foo");
create().offerFirst("e");
create().offerLast("e");
create().removeFirst();
create().removeLast();
create().pollFirst();

代码示例来源：origin: prestodb/presto

@Override
public Page getOutput()
{
  if (!outputPages.isEmpty()) {
    return outputPages.removeFirst();
  }
  return null;
}

代码示例来源：origin: google/guava

private @Nullable Iterator<? extends Iterator<? extends T>> getTopMetaIterator() {
 while (topMetaIterator == null || !topMetaIterator.hasNext()) {
  if (metaIterators != null && !metaIterators.isEmpty()) {
   topMetaIterator = metaIterators.removeFirst();
  } else {
   return null;
  }
 }
 return topMetaIterator;
}

代码示例来源：origin: twosigma/beakerx

/**
  * Remove all the characters observed.
  */
 public void reset() {
  while (!prevTwoChars.isEmpty()) {
   prevTwoChars.removeFirst();
  }
 }
}

代码示例来源：origin: prestodb/presto

@NullableDecl
private Iterator<? extends Iterator<? extends T>> getTopMetaIterator() {
 while (topMetaIterator == null || !topMetaIterator.hasNext()) {
  if (metaIterators != null && !metaIterators.isEmpty()) {
   topMetaIterator = metaIterators.removeFirst();
  } else {
   return null;
  }
 }
 return topMetaIterator;
}

代码示例来源：origin: google/j2objc

@NullableDecl
private Iterator<? extends Iterator<? extends T>> getTopMetaIterator() {
 while (topMetaIterator == null || !topMetaIterator.hasNext()) {
  if (metaIterators != null && !metaIterators.isEmpty()) {
   topMetaIterator = metaIterators.removeFirst();
  } else {
   return null;
  }
 }
 return topMetaIterator;
}

代码示例来源：origin: google/guava

/**
 * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
 * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
 * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the
 * <i>first</i> exception to be thrown from an attempt to close a closeable will be thrown and any
 * additional exceptions that are thrown after that will be suppressed.
 */
@Override
public void close() throws IOException {
 Throwable throwable = thrown;
 // close closeables in LIFO order
 while (!stack.isEmpty()) {
  Closeable closeable = stack.removeFirst();
  try {
   closeable.close();
  } catch (Throwable e) {
   if (throwable == null) {
    throwable = e;
   } else {
    suppressor.suppress(closeable, throwable, e);
   }
  }
 }
 if (thrown == null && throwable != null) {
  Throwables.propagateIfPossible(throwable, IOException.class);
  throw new AssertionError(throwable); // not possible
 }
}

代码示例来源：origin: prestodb/presto

@Override
  public void close()
      throws Exception
  {
    Throwable rootCause = null;
    while (!stack.isEmpty()) {
      AutoCloseable closeable = stack.removeFirst();
      try {
        closeable.close();
      }
      catch (Throwable t) {
        if (rootCause == null) {
          rootCause = t;
        }
        else if (rootCause != t) {
          // Self-suppression not permitted
          rootCause.addSuppressed(t);
        }
      }
    }
    if (rootCause != null) {
      propagateIfPossible(rootCause, Exception.class);
      // not possible
      throw new AssertionError(rootCause);
    }
  }
}

代码示例来源：origin: wildfly/wildfly

@NullableDecl
private Iterator<? extends Iterator<? extends T>> getTopMetaIterator() {
 while (topMetaIterator == null || !topMetaIterator.hasNext()) {
  if (metaIterators != null && !metaIterators.isEmpty()) {
   topMetaIterator = metaIterators.removeFirst();
  } else {
   return null;
  }
 }
 return topMetaIterator;
}

代码示例来源：origin: apache/ignite

/** */
  private void changeServer() {
    if (!backups.isEmpty()) {
      backups.addLast(primary);

      primary = backups.removeFirst();

      try {
        ch.close();
      }
      catch (Exception ignored) {
      }

      ch = null;
    }
  }
}

代码示例来源：origin: apache/incubator-druid

/**
 * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
 * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
 * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the
 * <i>first</i> exception to be thrown from an attempt to close a closeable will be thrown and any
 * additional exceptions that are thrown after that will be suppressed.
 */
@Override
public void close() throws IOException
{
 Throwable throwable = thrown;
 // close closeables in LIFO order
 while (!stack.isEmpty()) {
  Closeable closeable = stack.removeFirst();
  try {
   closeable.close();
  }
  catch (Throwable e) {
   if (throwable == null) {
    throwable = e;
   } else {
    suppress(throwable, e);
   }
  }
 }
 if (thrown == null && throwable != null) {
  Throwables.propagateIfPossible(throwable, IOException.class);
  throw new AssertionError(throwable); // not possible
 }
}

代码示例来源：origin: google/j2objc

/**
 * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
 * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
 * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the
 * <i>first</i> exception to be thrown from an attempt to close a closeable will be thrown and any
 * additional exceptions that are thrown after that will be suppressed.
 */
@Override
public void close() throws IOException {
 Throwable throwable = thrown;
 // close closeables in LIFO order
 while (!stack.isEmpty()) {
  Closeable closeable = stack.removeFirst();
  try {
   closeable.close();
  } catch (Throwable e) {
   if (throwable == null) {
    throwable = e;
   } else {
    suppressor.suppress(closeable, throwable, e);
   }
  }
 }
 if (thrown == null && throwable != null) {
  Throwables.propagateIfPossible(throwable, IOException.class);
  throw new AssertionError(throwable); // not possible
 }
}

代码示例来源：origin: robolectric/robolectric

/**
 * Ends the most recent active trace section.
 *
 * @throws {@link AssertionError} if called without any active trace section.
 */
@Implementation(minSdk = JELLY_BEAN_MR2)
protected static void endSection() {
 if (Trace.isTagEnabled(TRACE_TAG_APP)) {
  synchronized (lock) {
   if (currentSections.isEmpty()) {
    Log.e(TAG, "Trying to end a trace section that was never started");
    return;
   }
   previousSections.offer(currentSections.removeFirst());
  }
 }
}

代码示例来源：origin: Sable/soot

public static RefType lcsc(RefType a, RefType b, RefType anchor) {
 if (a == b) {
  return a;
 }
 Deque<RefType> pathA = superclassPath(a, anchor);
 Deque<RefType> pathB = superclassPath(b, anchor);
 RefType r = null;
 while (!(pathA.isEmpty() || pathB.isEmpty()) && TypeResolver.typesEqual(pathA.getFirst(), pathB.getFirst())) {
  r = pathA.removeFirst();
  pathB.removeFirst();
 }
 return r;
}

代码示例来源：origin: Sable/soot

public static RefType lcsc(RefType a, RefType b) {
 if (a == b) {
  return a;
 }
 Deque<RefType> pathA = superclassPath(a, null);
 Deque<RefType> pathB = superclassPath(b, null);
 RefType r = null;
 while (!(pathA.isEmpty() || pathB.isEmpty()) && TypeResolver.typesEqual(pathA.getFirst(), pathB.getFirst())) {
  r = pathA.removeFirst();
  pathB.removeFirst();
 }
 return r;
}

代码示例来源：origin: embulk/embulk

private boolean nextLine(boolean skipEmptyLine) {
  while (true) {
    if (!unreadLines.isEmpty()) {
      line = unreadLines.removeFirst();
    } else {
      line = input.poll();
      if (line == null) {
        return false;
      }
    }
    linePos = 0;
    lineNumber++;
    boolean skip = skipEmptyLine && (line.isEmpty() || (commentLineMarker != null && line.startsWith(commentLineMarker)));
    if (!skip) {
      return true;
    }
  }
}

代码示例来源：origin: square/okhttp

/**
 * Removes and returns the stream's received response headers, blocking if necessary until headers
 * have been received. If the returned list contains multiple blocks of headers the blocks will be
 * delimited by 'null'.
 */
public synchronized Headers takeHeaders() throws IOException {
 readTimeout.enter();
 try {
  while (headersQueue.isEmpty() && errorCode == null) {
   waitForIo();
  }
 } finally {
  readTimeout.exitAndThrowIfTimedOut();
 }
 if (!headersQueue.isEmpty()) {
  return headersQueue.removeFirst();
 }
 throw new StreamResetException(errorCode);
}

代码示例来源：origin: prestodb/presto

/**
 * Closes all {@code Closeable} instances that have been added to this {@code Closer}. If an
 * exception was thrown in the try block and passed to one of the {@code exceptionThrown} methods,
 * any exceptions thrown when attempting to close a closeable will be suppressed. Otherwise, the
 * <i>first</i> exception to be thrown from an attempt to close a closeable will be thrown and any
 * additional exceptions that are thrown after that will be suppressed.
 */
@Override
public void close() throws IOException {
 Throwable throwable = thrown;
 // close closeables in LIFO order
 while (!stack.isEmpty()) {
  Closeable closeable = stack.removeFirst();
  try {
   closeable.close();
  } catch (Throwable e) {
   if (throwable == null) {
    throwable = e;
   } else {
    suppressor.suppress(closeable, throwable, e);
   }
  }
 }
 if (thrown == null && throwable != null) {
  Throwables.propagateIfPossible(throwable, IOException.class);
  throw new AssertionError(throwable); // not possible
 }
}

代码示例来源：origin: Sable/soot

private <T> Set<T> reachable(T first, DirectedGraph<T> g) {
  if (first == null || g == null) {
   return Collections.<T>emptySet();
  }
  Set<T> visited = new HashSet<T>(g.size());
  Deque<T> q = new ArrayDeque<T>();
  q.addFirst(first);
  do {
   T t = q.removeFirst();
   if (visited.add(t)) {
    q.addAll(g.getSuccsOf(t));
   }
  } while (!q.isEmpty());

  return visited;
 }
}