Java copy stream to file

Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide. Load Comments. What's New. Most popular in Java. Most visited in School Programming. We use cookies to ensure you have the best browsing experience on our website. This method could re-throw the exception and the calling program would have deal with the file not being found.

Same for IO issues. There is really no run time benefit of having the nested try statements as having the resources closed after logging other exceptions. Minor point, if there is an exception throw whilst closing the inStream, the outStream will not be closed and any other exception would be lost.

The programmer might have thought it looked cleaner to put the close statements near the reading and writing but they could very well be moved to the outer try. In the given code it's used 32 kbytes but you could use any value. The size of the byte array and the size of your file determinate how many times you'll read the file, bigger buffers results in less reading calls, but aren't necessary if you're working with small files.

You can treat the exception in your code usually print the stack trace to debugging purposes or throw it, which means that when someone use your code will need to catch your code's exception.

Personally, I wouldn't write the code the same way the author did, it isn't easily readable. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 10 years, 3 months ago. Did you run the same program? Did you commented other ways to copy and ran each method one by one?

I did not rerun your tests. I copied your results above and reformatted the display to reveal that Stream Copy has the lowest time:. Time taken by Stream Copy I too took your results and aligned the numbers. Stream Copy took only half the time of Java7 file copy. Channel copy seems to be slowest! Yeah I got it now, I missed the extra bit in all other copy methods, updated the post. Thanks a lot. Your email address will not be published.

Prev Java File Permissions. Next How to open a File in Java. Pankaj I love Open Source technologies and writing about my experience about them is my passion. Follow Author. Comments Laila says:. September 8, at am. Security says:. July 26, at pm. Olaf Leimann says:. March 23, at am. Ana says:. November 15, at am. Harri says:. September 9, at am. Alessandro says:. Zarquon says:.

January 17, at am. Haibo Yan says:. The position is the place of a pointer from where the copy actions are to be started. Count specifies the size of the file which is nearly equal to the amount of content it contains.

This method is mainly called using the source channel and Count mentions the size of the source file and position from where the copy is to be made Hence, we can use any one of the two methods to transfer files data and copy them.

Initially, both the text files look like this. Skip to content. Change Language. Related Articles. Table of Contents.