Exception in finally

[kiran kumar]

Hi,
what happens when exception occurs at finally clause?

[Paul Sturrock]

One of those questions best answered by writing some code and seeing what happens.

[camilo lopes]

finally is optional, but you can use for close one file open for example. case you have forget.

one point important that finally only is run.

[haripriya vedula]

finally creates a block of code that will be executed after try/catch block is completed. The finally block will execute whether or not exception is thrown..

[Eric Daly]

It's just the same as if you had an exception thrown anywhere else... try it and see. Will you need to handle it? That depends on whether or not it's a checked exception.

[Bill Shirley]

Here's an example (yanked out of my code) of the case you are asking about...

static public Serializable serialClone(Serializable entity)  {

Serializable clone = null;
 
ObjectOutputStream outStream = null;
ObjectInputStream inStream = null; 
 
try { 
 ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); 
        outStream = new ObjectOutputStream(byteOut); 
        outStream.writeObject(entity); 
        outStream.flush(); 
 
        ByteArrayInputStream byteIn = new ByteArrayInputStream(byteOut.toByteArray());
        inStream = new ObjectInputStream(byteIn); 
 
        clone = (Serializable)inStream.readObject();
        
} catch (IOException ioe) {
log.error("Serial Clone Failure", ioe);

} catch (ClassNotFoundException cnfe) {
log.error("Serial Clone Failure", cnfe);

 } catch (RuntimeException e) {
 log.warn("Runtime error in serial clone", e);
 throw(e);
 
 } finally {
 try {
 outStream.close(); 
 } catch (IOException ioe) {
 log.error("Serial Clone Failure closing out stream", ioe);
 }
 
 try {
 inStream.close();
 } catch (IOException ioe) {
 log.error("Serial Clone Failure closing int stream", ioe);
 }
 }
 
 return clone;
} 

(note: i use this as a workaround, not as a standard copy mechanism)