Re: Read a file to get an ArrayList

Nigel Wade <>
Thu, 22 Jul 2010 17:30:14 +0100
On 22/07/10 15:51, Lew wrote:

Nigel Wade wrote:

You simply read it back in the way it was written out:

 FileInputStream fis = new FileInputStream("t.tmp");
 ObjectInputStream ois = new ObjectInputStream(fis);


Well, I was leaving such details as an exercise for the OP. I merely
intended to point them in the right direction, in line with the example
in the Javadocs.

But now you've brought it up, that try block should enclose the
FileInputStream/ObjectInputStream creation...

    @SuppressWarnings( "unchecked" ) // matches what was written

  ArrayList<String> dimensions = (ArrayList<String>) ois.readObject();

    @SuppressWarnings( "unchecked" ) // matches what was written

  ArrayList<String> colorpxl = (ArrayList<String>) ois.readObject();

  catch ( ClassCastException exc )
    // log and handle ...


.... and you should also catch IOException (or each individual sub-class
that might get thrown if you really want to), and don't forget the

Nigel Wade

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