java.awt.Image对象使用的内存

Question

How can I get the memory used by an instance of the class java.awt.Image ?

There are other similar questions , but is there an easier way of calculating the memory used by an object of a specific class ( java.awt.Image )?

I would prefer to get the amount of bytes used programatically and not via a profiler so that I can use it to calculate memory statistics inside my application.

Thanks in advance.

Answer 1

This will vary between implementations of java.awt.Image , because it depends how the subclass decides to store the data.

But for BufferedImage, img.getData().getDataBuffer(); will give you the raw DataBuffer that stores the image. You can then use getDataType() and getSize() to determine the capacity of the data buffer.