How to calculate java BufferedImage filesize

Question

I have a servlet based application that is serving images from files stored locally. I have added logic that will allow the application to load the image file to a Buffered

Answer 1

You can calculate the size of a BufferedImage in memory very easily. This is because it is a wrapper for a WritableRaster that uses a DataBuffer for it's backing. If you want to calculate it's size in memory you can get a copy of the image's raster using getData() and then measuring the size of the data buffer in the raster.

DataBuffer dataBuffer = bufImg.getData().getDataBuffer();

// Each bank element in the data buffer is a 32-bit integer
long sizeBytes = ((long) dataBuffer.getSize()) * 4l;
long sizeMB = sizeBytes / (1024l * 1024l);`