File Append In Java Example

Chapter: File Last Updated: 13-06-2016 19:28:30 UTC

Program:

            /* ............... START ............... */
                
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class JavaFileAppendString {
	public static void main(String[] args) {
		try {
			String content = " content will append to file";

			File file = new File("JavaScan.txt");

			// if file doesnt exists, then create it
			if (!file.exists()) {
				file.createNewFile();
			}

			// true = append file
			FileWriter fileWritter = new FileWriter(file.getName(), true);
			BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
			bufferWritter.write(content);
			bufferWritter.close();

			System.out.println("Done");

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}
                /* ............... END ............... */
        

Output

The content "content will append to file" will add to the file.

Notes:

  • In order to append a file we needFileWriter instance with the append flag set to true.
  • Syntax : BufferedWriter bw = new BufferedWriter(new FileWriter("file", true));
  • FileWritter, a character stream to write characters to file. By default, it will replace all the existing content with new content.

Tags

File Creation, Java

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