minutes

months

Creates a new empty {@link ConcurrentHashMap} instance. @since 3.0

产生 [min, max) 范围内的随机数 @param min @param max @return

产生 [min, max) 范围内的随机数 @param min @param max @return

Assert that the given String contains valid text content; that is, it must not be {@code null} and must contain at least one non-whitespace character.

Assert that the given String is not empty; that is, it must not be {@code null} and not the empty String. <pre class="code">Assert.hasLength(name, "Na

Inserts the specified element at the tail of this queue, waiting if necessary up to the specified wait time for space to become available. @return {@

Returns a splitter that uses the given fixed string as a separator. For example, {@code Splitter.on(", ").split("foo, bar,baz")} returns an iterable c

解析日期&时间

恢复私钥 @param input @return @throws InvalidKeySpecException

恢复公钥 @param input @return @throws InvalidKeySpecException

Returns consecutive {@linkplain List#subList(int, int) sublists} of a list, each of the same size (the final list may be smaller). For example, partit

在指定日期上加上指定天数 @param date @param days 天数 @return

Remove any entries that have been garbage collected and are no longer referenced. Under normal circumstances garbage collected entries are automatical

Inserts the specified element at the tail of this queue, waiting if necessary for space to become available. @throws InterruptedException {@inheritDo

Returns the lock used for reading. @return the lock used for reading

Remaining time to live of the lock @return time in milliseconds -2 if the lock does not exist. -1 if the lock exists but has no ass

Returns the number of additional elements that this queue can ideally (in the absence of memory or resource constraints) accept without blocking. This

Resolve the given class if it is a primitive class, returning the corresponding primitive wrapper type instead. @param clazz the class to check @retur

seconds

从数组中随机抽取N个不重复的元素 @param arr @param count @return

Serialize the given object to binary data. @param t object to serialize. Can be {@literal null}. @return the equivalent binary data. Can be {@literal