Append to File in Java: Explanation & Practice

Problem summary

Append a new line to an existing file without overwriting.

Starter code

import java.io.*;

public class Main {
    public static void main(String[] args) {
        // Append "New line" to existing file
        // Print: Append successful
    }
}

Expected output and test cases

• Line appended

  Append successful

Hints

1. FileWriter(file, true) for append mode
2. Second boolean parameter enables append
3. Don't forget newline character

Related File I/O exercises

• Practice Write to File in Java
• Practice Read from File in Java
• Practice Count Lines in File in Java

Practice all File I/O exercises · Run this idea in the Java compiler