How to append content to an existing file in Java

In this tutorial, we are going to see how to add content to an existing file in Java. In Java, you can use FileWriter(file, true) to add new content at the end of a file.

How to append content to an existing file in Java

public class Main {
	public static void main(String[] args) {

		BufferedWriter bw = null;
		FileWriter fw = null;

		try {
			String data = "Welcome To StackHowTo!";

			File file = new File("C:\\Users\\PC\\Desktop\\bb.txt");

			// if the file does not exist, create it
			if (!file.exists()) {

			// Append the content to the existing file
			fw = new FileWriter(file.getAbsoluteFile(), true);
			bw = new BufferedWriter(fw);



		} catch (IOException e) {
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