Monday, 20 June 2016

Java Tutorial : Java Exception handling (catch block)


Click here to watch in Youtube :
https://www.youtube.com/watch?v=yFNCrAbHx7E&list=UUhwKlOVR041tngjerWxVccw

Click the below Image to Enlarge
Java Tutorial : Java Exception handling (catch block) 
Java Tutorial : Java Exception handling (catch block) 
Java Tutorial : Java Exception handling (catch block) 
ExceptionDemo1.java
public class ExceptionDemo1
{
    public static void main(String[] args)
    {
        String firstName = null;

        // May throw an Exception
        System.out.println(firstName.length());

        String lastName = "Peter";
        String fullName = firstName + lastName;
        System.out.println("fullName = " + fullName);
    }

}
Output
Exception in thread "main" java.lang.NullPointerException
    at ExceptionDemo1.main(ExceptionDemo1.java:8)
ExceptionDemo2.java
public class ExceptionDemo2
{
    public static void main(String[] args)
    {
        String firstName = null;
        
        try
        {
          // May throw an Exception 
          System.out.println(firstName.length());
        }
        catch(NullPointerException nullPointerException)
        {
            System.out.println("String is null");
        }
        
        String lastName = "Peter";
        String fullName = firstName+lastName;
        System.out.println("fullName = "+fullName); 
    }

}
Output
String is null
fullName = nullPeter
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/ExceptionDemo_Catch_block_App.zip?attredirects=0&d=1

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

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/7ea4d57e363810e74440016acde7820188971dcf/BasicJava/ExceptionDemo_Catch_block_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
  • No comments:

    Post a Comment

    Google+ Followers

    Google+ Badge