Thursday, 23 June 2016

Java Tutorial : Java Exception handling (rethrow Exception)


Click here to watch in Youtube :
https://www.youtube.com/watch?v=3-yQUgVCYH0&list=UUhwKlOVR041tngjerWxVccw

ReThrowDemo.java
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;

public class ReThrowDemo
{
    public static void main(String[] args)
    {

        try
        {
            new ReThrowDemo().getFileInfo();
        }
        catch (IOException e)
        {
            System.out.println("Exception handled.");
        }

        System.out.println("normal flow...");

    }

    private void getFileInfo() throws IOException
    {

        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter the fileName : ");
        String fileName = scanner.nextLine();
        scanner.close();

        /*
         * Wrap a BufferedReader around FileReader.
         */
        BufferedReader bufferedReader;
        try
        {
            bufferedReader = new BufferedReader(new FileReader(
                    fileName));

            /*
             * Use the readLine method of the BufferedReader
             * to read one line at a time. the readLine
             * method returns null when there is nothing
             * else to read.
             */
            String line = null;

            while ((line = bufferedReader.readLine()) != null)
            {
                System.out.println(line);
            }

            // Close the BufferedReader when we're done.
            bufferedReader.close();
        }
        catch (IOException e)
        {
            System.out.println("Rethrowing the IOException");
            /*
             * We can rethrow an exception by throwing same
             * exception in catch block
             */
            throw e;
        }
    }

}
Output
Enter the fileName : hi.txt
Rethrowing the IOException
Exception handled.
normal flow...
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/ExceptionDemo_Rethrow_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ExceptionDemo_Rethrow_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/969ffd88eb34c4fd42d966118b27490392b78865/BasicJava/ExceptionDemo_Rethrow_App/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
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