Using java reflection we can inspect a class, interface, enum, get their structure, methods and fields information at runtime even though class is not accessible at compile time. Reflection in Java is one of the advance topic of core java. Let’s take a look at the Runnable interface in the java. Fields, methods, and member types of an interface type may have the same name, since they are used in different contexts and are disambiguated by different. Many interfaces either require or return a Fields collection these include IClass (therefore, also IObjectClass and IFeatureClass), ICursor, IIndex. Java Reflection provides ability to inspect and modify the runtime behavior of application. A Field permits widening conversions to occur during a get or set access operation, but throws an IllegalArgumentException if a narrowing conversion would occur. The reflected field may be a class (static) field or an instance field. This type has no instance variables, and typically declares one or more abstract methods otherwise unrelated classes can implement the interface by providing implementations for its abstract methods. What is an interface in Java?Simply put, an interface is a collection of methods with empty bodies. A Field provides information about, and dynamic access to, a single field of a class or an interface. An interface declaration introduces a new reference type whose members are classes, interfaces, constants, and methods. Sometimes I thought interfaces are not necessary and redundant.Over the time, by coding and reading a lot, I have been grasping a strong understanding about interfaces and realizing its importance and roles in designing good software programs.Therefore, I hope what I am going to share with you today about interfaces would help you save time on understanding this important concept in Java programming. Because the program is still able to run with or without interfaces, right?Did you think so in the beginning time you learn about interfaces in Java?I didn’t understand the benefits of using interfaces when I started learning Java. Interfaces may contain static and final variables which are useful if you want. At first glance, many see that interfaces increase the amount of code and complexity of a program. All fields declared inside an interface are public, static and final by default. Perhaps one of the most confusing concepts for beginners in Java is the concept of interface.
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