how can i resume to the next instruction when my previous instruction raised excption

[siddhu Math]

hi

i have a condition say i am doing i/o operation and i did not get the file at the path specified and the whole code is in a try catch block.when i execute an exception is raised then the catch block gets executed and the process terminates.

now what my question is i do not want the process to be terminated i want it again to execute the method which threw that exception.


---------------

[Balasubramanian Chandrasekaran]

You have to check that condition yourself using methods in the File API before performing any operation over file. You can use
exists() method to achieve this.
If you get a negative result then you can code it to repeat the same sequence how many times you need.

There is nothing you can do in case of Try - Catch.Once exception is caught then the program is tend to terminate.
[ January 10, 2008: Message edited by: Balasubramanian Chandrasekaran ]

[Roger Chung-Wee]

Do you have control over the client which executes the I/O method? If so, the client can handle the exception and do something like prompt the user to reinput the filename and resubmit the request.

[Campbell Ritchie]

You could put your try block inside a loop, like this

public List<String> readFromFile(File myFile)
{
   List<String> stringList = new ArrayList<String>();
   boolean needsRead = true;
   FileReader inFile = null;
   BufferedReader inBuff = null;
   while(needsRead)
   {
      try
      {
          try
          {
             inBuff = new BufferedReader(inFile = new FileReader(myFile));
             while((input = inBuff.nextLine()) != null)
             {
                stringList.add(input);
             }//end while
             needsRead = false;
          }//end inner try
          finally
          {
             if(inBuff != null)
                inBuff.close();
          }//end finally
      }//end try
      catch(FileNotFoundException fnf)
      {
          JFileChooser chooser = new JFileChooser();
          System.err.println("File not available; please confirm it with this file chooser, or cancel to give up");
          if(chooser.showOpenDialog(myFrame) == JFileChooser.ACCEPT_OPTION)
          {
             myFile = chooser.getSelectedFile();
          }//end if
          else
          {
             needsRead = false;
          }//end else
      }//end catch FNFExc
      catch(IOException ioe)
      {
         ioe.printStackTrace();
      }//end catch IOExc
   }//end while
   return stringList;
}//end read from file

Something I just knocked up in a minute, risk of its returning a zero-length List if anything goes wrong, or a zero-length String as the last element, but it gives an opportunity of repeating the reading if there is an Exception.