如何相对于标记翻转 ByteBuffer？

Question

Is there a built-in way, or alternatively, what is the cleanest way, to flip a java NIO ByteBuffer relative to the mark?

That is, flip() sets limit := position and then position := 0 . I would like a flipToMark() routine that sets limit := position and then position := mark .

Answer 1

Flipping clears the mark, so unfortunately buffer.flip().reset() won't work.

How about buffer.limit(buffer.position()).reset() ?

Answer 2

In many cases it may be easier to create a view buffer starting at mark (eg using slice() ), instead of actually setting the mark . In this case you can use the regular flip() method.