File I/O Java

   
  import java.io.*;   
  public class fileStreamTest {   
   public static void main(String args[]) {   
   try {   
    byte bWrite [] = {11,21,3,40,5};   
    OutputStream os = new FileOutputStream("test.txt");   
    for(int x = 0; x < bWrite.length ; x++) {   
     os.write( bWrite[x] ); // writes the bytes   
    }   
    os.close();   
    InputStream is = new FileInputStream("test.txt");   
    int size = is.available();   
    for(int i = 0; i < size; i++) {   
     System.out.print((int)is.read() + " ");   
    }   
    is.close();   
   } catch (IOException e) {   
    System.out.print("Exception");   
   }      
   }   
  }   

output: