JAVA Linkedlist易混淆的方法

Returning null + removing operations:

poll()

,

pollFirst()

.

Returning null + not removing operations:

peek()

,

peekFirst()

.

Throwing exception + removing operations:

pop()

,

remove()

,

removeFirst()

.

Throwing exception + not removing operations:

element()

,

getFirst()

.

参考http://stackoverflow.com/questions/14851367/java-linkedlist-differences-between-retrieve-operations