If I create an array of bytes with byte[], what would be the size of each element? Can they be resized/merged?
Thanks,
If I create an array of bytes with byte[] , what would be the
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If I create an array of bytes with byte[], what would be the size of each element? Can they be resized/merged?
Thanks,
The size would be a byte per element.
They can not be re-sized. However you can merge them yourself using System.arrayCopy() by creating a new array and copying your source arrays into the new array.
Edit 1:
There is also an 8-byte overhead for the object header and a 4-byte overhead for the array length, for a total overhead of 12 bytes. So small arrays are relatively expensive.
Check out GNU Trove and Fastutil. They are libraries that make working with primitive collections easier.
Edit 2:
I read in one of your response that you’re doing object serialization. You might be interested in ByteBuffers. Those make it easy to write out various primitive types to a wrapped array and get the resulting array. Also check out Google protocol buffers if you want easily serialized structured data types.