save a file in java
<p>I am trying to save a file in Java in this way:</p>

<pre><code>PrintWriter output = null;
int x=5, y = 6;
try {               
    saveFile = new FileOutputStream("myFile.txt");
    save = new ObjectOutputStream(saveFile);    
    save.writeObject(x + y);
    save.close();                   
} catch (FileNotFoundException e) 
{               
    e.printStackTrace();
} catch (IOException e) 
{
    e.printStackTrace();
}
</code></pre>

<p>and it is working but how can I save an object from another class because it is giving me an error when I try to do it.     </p>
