java.nio.ByteBuffer的几个常用方法

1、flip()

limit = position;

position = 0;

mark = -1;

2、rewind()

position = 0;

mark = -1;

3、clear()

position = 0;

limit = capacity;

mark = -1;

4、mark()

mark = position;

5、reset()

int m = mark;

if (m < 0)

throw new InvalidMarkException();

position = m;

===^^===

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