HowToDoInJava

About Us

I am Lokesh Gupta. I am working as a senior analyst with one of the biggest bank in USA. I love to discuss things and that’s exactly why I am here.

In java, I have around 10 Yrs of experience which has only increased my hunger for learn. In this blog, I will be writing on different topics occasionally, and would love to engage some meaningful serious discussions with you folks.

My other hobbies include playing Table Tennis, Badminton and Carom. I also love watching all kind of Hollywood movies. In fact, I am a big fan of Steven Spielberg, James Cameron and Tom hanks.

Note: Neither any post or part of it, neither any comment or anything written in blog should be relate with my employer. All expressed views are my own and I am the only one responsible for the content on this blog.

My presence in DZone

  1. Java is pass by value and not pass by reference
  2. Unit testing best practices

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Feedback, Discussion and Comments

  1. Hi Lokesh

    Really appreciate with your bold articles, i love almost all.
    I am just practicing my self for microsevice example. so you have consolidate example, with gateway+ragistry+auth(Oauth 2)+Any service.

    If you had please share code with me
    If possible can you please share your whats app contact number.

    Reply

  2. tks for share Java 8 Tutorial.
    🙂

    Reply

  3. Hello Sir,
    Really loved your blogs.
    Please share some good practical reading materials or your blog if any for Apache Kafka with Java and Docker complete example.

    Regards,
    Salman Khan

    Reply

  4. Hi,
    Can you write an article about why method definition is now allowed in interfaces from Java 10?

    Thanks

    Reply

  5. HI Lokesh, you explain this concurrency topics in a great way, but I cannot find synchronized volatile explained by you.

    Reply

  6. i want know to use apache library in our website it requires some licence if yes then how please reply fast

    Reply

  7. Hi Lokesh,
    for some reason your singleton page captcha is not working well, so I post my comment here.
    In your Lazy initialization part, you named the double checked version implenetation as EagerSingleton.

    public class EagerSingleton {
    private static volatile EagerSingleton instance = null;
 
    // private constructor
    private EagerSingleton() {
    }
 
    public static EagerSingleton getInstance() {
        if (instance == null) {
            synchronized (EagerSingleton.class) {
                // Double check
                if (instance == null) {
                    instance = new EagerSingleton();
                }
            }
        }
        return instance;
    }
}

    Since its not an Eager initialization i would recommand changing the class name. Apart from that I like very much your blog.

    Reply

    • I will check it. And thanks for letting me know about captcha thing. I will fix it.

      Reply

  8. hi lokesh..I want to uninstall oracle10gxe.while deleting msvcr71.dll and oci.dll it is showing an error msg that “the action can’t be completed because it is open in windows explorer”.please suggest me how i will delete msvcr71.dll and oci.dll??

    Reply

    • Restart the system and kill all oracle processes from windows services or task manager. You should be able to delete all files now.

      Reply

  9. Just a feedback,… U r awesome! Its a great learning experience for all java developers.

    Reply

  10. Hi Lokesh, I am trying to display ebills information when a click on view or pay bill. I am trying to do this using spring mvc hibernate jsp. Regarding this i need to send a detailed mail to your mail id inorder to fix some issues.

    Reply

    • howtodoinjava[at]gmail[dot]com

      Reply

  11. hi

    do you have any working examples of spring security using
    KeyBasedPersistenceTokenService?

    My requirement is to use json/rest architecture with Spring MVC 3 annotations, spring security with token exchange.

    thanks

    Reply

    • yeah,I also want a same example where spring security has been implemented with OAuth protocol.OAuth 2.0 is been used by all sites(FB,G+,ebay) to grant permission 3rd party users to use their data.

      I’m sure Lokesh will help on this.It would be helpful for him also.

      Reply

  12. great job.. really good information.. all at one place..

    Reply

  13. can u explain these problem clearly

    2) If the class contains members of any class type then only the object references to those members are copied and hence the member references in both the original object as well as the cloned object refer to the same object.

    Reply

    • Thanks Anish for motivation.

      Reply

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