Once we have a particular attribute name we wish to get the associated value for, we allocate a ByteBuffer of the right size for the value and then call the view's read (String, ByteBuffer) method.

一旦我们拥有了想得到相关值的特定属性名，就为该值分配一个大小合适的ByteBuffer，然后调用视图的read (String, ByteBuffer)方法。

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