Why use FileOutputStream and DataOutputStream in combination if reading and writing binary files?

xiaoluking

Why use FileOutputStream and DataOutputStream in combination if reading and writing binary files? Why not just use DataOutputStream?

wohehuan

You want to write the information to the file. Of course, you need to use FileInputSteam and FileOutPutStram(), which are the input and output streams for reading and writing files.
As for why use dataOutPutSteam()
Because this is a package, it can make data transmission faster and safer