我想从字节数组中提取一组坐标到DoubleBuffer中。

以下是如何将一组坐标从主字节数组提取到另一个字节数组的示例。

byte intPoints[] = new byte[4];
byte geomCoords[];
...
is = new ByteArrayInputStream(stmt.column_bytes(0)); //reads the polygon from db
...
is.read(intPoints); //intPoints now holds the number of points in the polygon
//After this is read the actual coordinate list is next

//Set the size of geomCoords to hold all coordinates,
//There are 2 coordinates per point and each coordinate is a double value(8 bytes)
geomCoords = new byte[ByteBuffer.wrap(intPoints).order(endian).getInt() * 2 * 8];

is.read(geomCoords); //geomCoords now holds all the coordinates for the polygon

我的问题是：
如何将geomCoords字节数组放入DoubleBuffer？
还是
可以在不创建geomCoords的情况下将这些数据放入DoubleBuffer中？速度和效率是关键，因此任何捷径或优化都是最欢迎的！