This class defines four categories of operations upon double buffers:

• Absolute and relative get and put methods that read and write single doubles;

• Relative bulk get methods that transfer contiguous sequences of doubles from this buffer into an array; and

• Relative bulk put methods that transfer contiguous sequences of doubles from a double array or some other double buffer into this buffer; and

• Methods for compacting , duplicating , and slicing a double buffer.

Double buffers can be created either by allocation , which allocates space for the buffer's content, by wrapping an existing double array into a buffer, or by creating a view of an existing byte buffer.

Like a byte buffer, a double buffer is either direct or non-direct. A double buffer created via the wrap methods of this class will be non-direct. A double buffer created as a view of a byte buffer will be direct if, and only if, the byte buffer itself is direct. Whether or not a double buffer is direct may be determined by invoking the isDirect method.