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How do I append a file to Java? Add to the end, update the file

How do I append a file to Java? Theory

  • If you are working with small amounts of textual information, use with a flag in the constructor (see practice below for details).FileWritertrue
  • If the number of operations with files is very large, then it is desirable to use .BufferedWriter
  • To add binary data or data from an open stream to a file, you must use the .FileOutputStream

How to update a file. Practice

Below is an example of a program that shows in the work of each of the described ways to add to the file (update the file) in Java:

Use the method you need depending on the specifics of your project.