Integer object to stream (using Java) Technical Assessment 3

import java.io.*;

public class Task1{
  public static void main(String[] args){

    // Write to file
    try {
      OutputStream output_stream_object = new FileOutputStream("Task1_test.txt");
      Integer data = 809;
      byte[] data_bytes = data.toString().getBytes();
      output_stream_object.write(data_bytes);
      System.out.println("Successfully wrote to the file!");
      output_stream_object.close();
    } catch (Exception e) {
      e.printStackTrace();
    }

    // Read from file
    try {
      InputStream input_stream_object = new FileInputStream("Task1_test.txt");
      byte[] array_data = new byte[input_stream_object.available()];
      input_stream_object.read(array_data);
      String full_data = new String(array_data);
      System.out.println("Successfully read from the file!");
      System.out.println("Data from the file: ");
      System.out.println(full_data);
      input_stream_object.close();
    } catch (Exception e) {
      e.printStackTrace();
    }

  }
}