Writing a Custom Annotations in Java

Writing a Custom Annotations in JavaIf you're new to the world of annotation development, you may be wondering how to write a custom annotation in Java. You might think that it's a complex task and is only worth doing for large, complex applications. However, as with most things, there are simpler ways to write custom annotations. In this article, we'll go over three simple steps that will get you started on your way to using annotations to your advantage.In order to write a custom annotation, you first need to understand how the annotation system works. There are two ways that annotation systems work, in the form of types and namespaces. Let's talk about types first. Annotation systems have a type called the target type. This is the type that the annotation will be applied to.Next, there is a type called the name of the annotation. The name is what the reader or a third party appends to the source code where the annotation is to be applied. Here's an example:if (foo.equals(Bar, Bar) ) Another way to remember this is to think of the name of the annotation as a context-sensitive argument. This means that you can make use of more than one name for the same argument in the same annotation. This is particularly useful when applying multiple conditional declarations at once.Let's take a simple example. Say you want to write a custom annotation that would apply to each method in your class. Let's assume that you want to create a custom annotation called FooBarBar which applies to the methods of class Foo. To create this annotation, you would need to use an @Foo annotation, followed by a colon and then your method name, followed by a space. So the following annotation would apply to all of the methods in class Foo:* @Foo* @Foo * @Foo * @Foo * @Foo You can also use your own names for the methods, but you won't be able to put a * after the method name. You also can't use a * between two method names.All three of these examples are completely valid Java annotations that y ou can use to write your own annotations. By understanding how to write a custom annotation in Java, you can easily add extra functionality to your program.