Check if there is enough memory before allocating byte array

Question

I need to load a file into memory. Before I do that I want to make sure that there is enough memory in my VM left. If not I would like to show an error message. I want to av

Answer 1

You may want to look at the FileChannel.map(FileChannel.MapMode, long, long) method. This allows mapping a file (think POSIX mmap) without filling the heap. The operating system will (hopefully successfully) take care of the memory for you.