FileReader querry

[Sadaqatullah Noonari]

I am using FileReader class in my code. It say an error when it does not find the file. I want to handle this error such that if file is not found, it makes and then moves on. need help in this problem.

[Hebert Coelho]

Put a try/catch when this exception happens, and return/continue(inside a loop).

[Randall Twede]

yeah that is easily done. i have an old example i remember...hold on

    public void loadKnowledgeBase()
    {
        try // open file and read strings into the two vectors
        {
            BufferedReader in = new BufferedReader(new FileReader("knowledge.txt"));
            String temp = in.readLine();
            while(!temp.equals(":"))
            {
                inOrder.add(temp);
                temp = in.readLine();
            }
            temp = in.readLine();
            while( temp != null )
            {
                preOrder.add(temp);
                temp = in.readLine();
            }
            in.close();
        }
        catch(Exception e)  // file didn't exist
        {
            try // create the file and make recursive call to loadKnowledgeBase
            {
                PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("knowledge.txt")));
                out.println("Is it a trout?");
                out.println("Does it live on land?");
                out.println("Is it a dog?");
                out.println(":");
                out.println("1");
                out.println("0");
                out.println("2");
                out.close();
                loadKnowledgeBase();
            }
            catch(Exception ex)
            {
                System.out.println("exception occurred");
            }
        }
    }