Java-集合-Collection类

1 需求

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2 接口

Interface Collection<E>

public interface Collection<E> extends Iterable<E>

2.3 Method Detail

• int size()
• boolean isEmpty()
• boolean contains(Object o)
• Iterator<E> iterator()
• Object[] toArray()
• <T> T[] toArray(T[] a)
• boolean add(E e)
• boolean remove(Object o)
• boolean containsAll(Collection<?> c)
• boolean addAll(Collection<? extends E> c)
• boolean removeAll(Collection<?> c)
• default boolean removeIf(Predicate<? super E> filter)
• boolean retainAll(Collection<?> c)
• void clear()
• boolean equals(Object o)
• int hashCode()
• default Spliterator<E> spliterator()
• default Stream<E> stream()
• default Stream<E> parallelStream()

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3 示例

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4 参考资料