How do I rename a file using Java

0 votes
Can we rename a file say test.txt to testa.txt ?

If testa.txt exists will it rename ?

How do I rename it to the already existing testa.txt file so the new contents of test.txt are added to it for later use?
Jun 26, 2018 in Java by Daisy
• 8,120 points
559 views

2 answers to this question.

0 votes

Try This

File file=new File("Your File");
boolean renameResult = file.renameTo(new File("New Name"));
answered Jun 26, 2018 by scarlett
• 1,290 points
0 votes
// File (or directory) with old name
File file = new File("oldname");

// File (or directory) with new name
File file2 = new File("newname");

if (file2.exists())
   throw new java.io.IOException("file exists");

// Rename file (or directory)
boolean success = file.renameTo(file2);

if (!success) {
   // File was not successfully renamed
}

To append to the new file:

java.io.FileWriter out= new java.io.FileWriter(file2, true /*append=yes*/);
answered Oct 5, 2018 by Sushmita
• 6,910 points

Related Questions In Java

0 votes
1 answer

How do I save a String to a text file using Java?

If you're simply outputting text, rather than ...READ MORE

answered Dec 30, 2020 in Java by Gitika
• 65,910 points

edited Jul 6, 2023 by Khan Sarfaraz 1,759 views
0 votes
1 answer

How do I create a Java string from the contents of a file?

If you're looking for an alternative that ...READ MORE

answered Apr 19, 2018 in Java by Rishabh
• 3,620 points
927 views
0 votes
1 answer

How can I read a large text file line by line using Java?

// Open the file FileInputStream file = new ...READ MORE

answered May 2, 2018 in Java by Parth
• 4,630 points
683 views
0 votes
4 answers

How do I check if a file exists in Java?

To test to see if a file ...READ MORE

answered Dec 29, 2020 in Java by Rajiv
• 8,910 points
58,343 views
0 votes
2 answers

How can I get the filenames of all files in a folder which may or may not contain duplicates

List<String> results = new ArrayList<String>(); File[] files = ...READ MORE

answered Sep 12, 2018 in Java by Sushmita
• 6,910 points
1,634 views
0 votes
2 answers

Store String inside a File using Java

We can use Apache Commons IO. It ...READ MORE

answered Jul 20, 2018 in Java by Sushmita
• 6,910 points
1,056 views
0 votes
2 answers

How to read a text file in Java?

You can use Scanner class to read ...READ MORE

answered Aug 9, 2018 in Java by Parth
• 4,630 points
754 views
0 votes
3 answers

How to convert File to Byte[] in Java?

import java.io.File; import java.nio.file.Files; File file; // ...(file is initialised)... byte[] ...READ MORE

answered Aug 15, 2018 in Java by samarth295
• 2,220 points
1,929 views
0 votes
1 answer

Number of lines in a file in Java

I found this an efficient way in counting ...READ MORE

answered Jul 4, 2018 in Java by scarlett
• 1,290 points
399 views
0 votes
2 answers

How to left pad a string with zero in java?

String paddedString = org.apache.commons.lang.StringUtils.leftPad("129018", 10, "0") the second ...READ MORE

answered Aug 31, 2018 in Java by Sushmita
• 6,910 points
2,836 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP