question: @ Override public < T > T [ ] toArray ( T [ ] array ) { return newArray ( array ) ; }
target:  Returns all the elements in an array, and the type of the result array is the type of the argument array. If the argument array is big enough, the elements from the queue will be stored in it(element immediately following the end of the queue is set to null, if any); otherwise, it will return a new array with the size of the argument array and size of the queue.