Writing data in an already made file [duplicate]

Question

Possible Duplicate:
How to append text to an existing file in Java

I ave a file already made in C:\myfile.txt and it has some data in it.. Now when I try to use File files = new File("C:\myfile.txt"); , It overwrites th orignal data and inserts the new data in it.. Is there a mechanism to aviod overwriting of old data?...

Do you want to add data to the file? Consider this question Otherwise what would you like to happen to the old and new files? — Mark Meyer
– Mark Meyer, Commented Nov 24, 2012 at 21:40
Absolutely. How would your code know what to do with the existing data? — darrengorman
– darrengorman, Commented Nov 24, 2012 at 21:40
Look at this [FileOutputStream Constructor](docs.oracle.com/javase/7/docs/api/java/io/…, boolean)) and it's boolean append parameter. — jlordo
– jlordo, Commented Nov 24, 2012 at 21:40

Reimeus · Accepted Answer · 2012-11-24 21:40:39Z

3

You could use append mode in one of the file writer classes:

FileWriter writer = new FileWriter("myfile.txt", true);

answered Nov 24, 2012 at 21:40

Reimeus

160k16 gold badges225 silver badges282 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

jtahlborn · Accepted Answer · 2012-11-24 21:40:07Z

3

use the method new FileOutputStream(File,true) to append to an existing file.

answered Nov 24, 2012 at 21:40

jtahlborn

53.8k5 gold badges80 silver badges122 bronze badges

Comments

Jatin · Accepted Answer · 2012-11-24 21:43:22Z

Provide true in the constructor to append the file as told above For more detailed control, use RandomAccessFile

Collectives™ on Stack Overflow

Writing data in an already made file [duplicate]

3 Answers 3

Comments

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Linked

Related