Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
899 views
in Technique[技术] by (71.8m points)

file io - Java RandomAccessFile vs. DataInputStream for byte operations

I need to read bytes from a file.
Is there a difference (e.g. efficiency, memory, runtime, complexity and inelegance of code) between using RandomAccessFile and using DataInputStream?

The only method I use is readByte().

Similarly for the other direction, is there a difference between RandomAccessFile and DataOutputStream if all that is needed is writeByte()?
(The fact that RandomAccessFile is bidirectional doesn't count, the reading and writing are not connected and cannot share it).

Is there any other object that would better suit that kind of reading and writing?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

If you are only doing sequential access, by themselves they are essentially equivalent; however a DataInputStream around a BufferedInputStream around a FileInputStream will be considerably more efficient than a RandomAccessFile.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

2.1m questions

2.1m answers

60 comments

57.0k users

...