Ramblings of a Developer
StringUtils java class in Apache commons library provides a method isNumeric to check if given sequence of characters contains digits only. But this is not a sure shot way to check for numbers because for a string containing decimal the StringUtils.isNumeric returns false as shown below: A better approach is to use NumberUtils.isCreatable which adopts … Read more
Spring provides an annotation @Async to run tasks in a separate thread. In Spring boot applications we can enable asynchronous tasks by adding the annotation @EnableAsync to any of the Spring configuration class as shown below: Now that we have the application setup to support asynchronous tasks, let us go ahead and create a simple … Read more
In one of my previous posts I showed you how to generate HTML from XML data using XSLT. At times you would need to pass certain parameters to the XSLT and use the value of that parameter in generating your content. In this post we will exactly do that. This will be our sample XML … Read more
In this post I will show you how to convert XML to HTML using XSLT in Java using Saxon HE version 11 library We will add the dependency to our pom: Our sample XML will be: The XSLT we will be using to convert the XML into HTML is: Following are the steps to process … Read more
In my previous post I showed how you can integrate with Completion API. The completion API doesnt support the ChatpGPT model. The ChatGPT model is supported in the Chat completion API. In this post we will look at integrating with this new API using WebClient. Below are the POJOs we will be using for parsing … Read more
By now you all would have heard about OpenAI and played with its famous product ChatGPT. OpenAI also provides APIs which can be used to integrate features like text completion, code generation, image generation and chat completion in your applications. In this post I will show you how to make use of the Text completion … Read more
Prior to Sealed Classes feature there were two ways a developer could prevent a class to be extended: by declaring the class as final where no one can extend this class. 2. by making the class package private where no one outside the package can access the class and hence no one outside the package … Read more
We all have used instanceof check with a subsequent cast to the desired type and in this process, we are doing two operations: validating whether the object we have is of the desired type using instanceof when the validation is true then we cast the object to the desired type and proceed with the operations. … Read more
In my previous post, I introduced you to the new construct called Records which was introduced in Java 16. In this post, I will go a bit deeper into how you can override the default constructor of a record which is different from the no-arg default constructor of a class. Default constructor in a record … Read more
We all, Java programmers, have complained whenever we were forced to create a class or use maps just to hold some data whilst other newer languages provided some out-of-the-box data structure for the same. Our problem has been addressed by introducing “Records” as part of the JEP 395 in Java 16. This construct is introduced … Read more