Question

Using netbeans to write a program to create a file named CreateBinaryfile.txt if it does not exist. Append new data to it if it already exists. Write 20 integers created randomly into the file using binary I/O. Thanks.

Answer 1

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;

public class AppendBinaryFile {

    public static void main(String[] args) {
        File file = new File("CreateBinaryfile.txt");
        try {
            FileOutputStream fileOutputStream = new FileOutputStream(file, true);
            Random random = new Random();
            for (int i = 0; i < 20; i++) {
                fileOutputStream.write(String.valueOf(random.nextInt()).getBytes());
                fileOutputStream.write('\n');
            }
            fileOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}