Apr 1, 2012 · use a FileWriter instead. the second argument in the constructor tells the FileWriter to append any given input to the file rather than overwriting it. here is some code for your example: if(!log.exists()){ System.out.println("We had to make a new file."); log.createNewFile(); FileWriter fileWriter = new FileWriter(log, true);

Apr 21, 2018 · Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written. Parameters: fileName - String The system-dependent filename. append - boolean if true, then data will be written to the end of the file rather than the beginning.

Nov 24, 2010 · The hard way: Read the entire file, then write it out plus the new data. The easy way: Open the file in "append" mode: new FileWriter( path, true );

This tutorial teaches you how to write to a file in Java without overwriting the existing content. This type of application is useful in writing the application log data into a file. In this this we have a "log.txt" file which already contains the data and our program will write to this file without overwriting the content of "log.txt" file.

Jan 10, 2025 · The FileWriter class in Java is used to write character-oriented data to a file. It is a character-oriented class that is used for file handling in Java. This Class inherits from OutputStreamWriter class which in turn inherits from the Writer class.

Sep 11, 2023 · Java FileWriter and FileReader classes are used to write and read data from text files (they are Character Stream classes). It is recommended not to use the FileInputStream and FileOutputStream classes if you have to read and write any textual information as …

Write To a File. In the following example, we use the FileWriter class together with its write() method to write some text to the file we created in the example above. Note that when you are done writing to the file, you should close it with the close() method:

Appending text to an existing file in Java can be performed effortlessly using the `FileWriter` class. This technique allows you to add content while preserving the existing data without overwriting it.

May 29, 2015 · FileWriter(String fileName) // Constructs a FileWriter object given a file name. FileWriter(String fileName, boolean append) // Constructs a FileWriter object given a file name with a boolean indicating whether or not to append the data written.

Dec 1, 2023 · In this tutorial, we’ll explore different ways to write to a file using Java. We’ll make use of BufferedWriter , PrintWriter , FileOutputStream , DataOutputStream , RandomAccessFile , FileChannel, and the Java 7 Files utility class.