Method overloading states that we can have methods with the same name but something in their parameters should be different. If you know about constructor overloading then it is pretty similar to method overloading. Method overloading helps us from writing the same methods under different names. For example, a method involving multiplication of 2 numbers …
The word “Encapsulation” means that closing something like we put the main power of the tablet inside the capsule. It is a mechanism that is done to bind the data and protect it from being used by everyone. After doing encapsulation, the variables and the data of one class cannot be used in another class …
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This article will look at how we can use Java Reflection API to invoke a Static method. We will see the steps and the explanation with code. Let us first have a quick look at Reflection API. Reflection in Java is a process of examining or modifying the behavior of a class at run time. …
In this article, we will talk about the Java program for employee details using class and object. An Employee is a person or also be referred to as an entity that consists of various attributes such as – emp_id, emp_name, emp_salary, emp_department, emp_email, emp_address, and many more. We use the getter (to receive Employee details) …
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In this article, we will learn about covariant return types in Java. Before Java version 5.0, we could not change the return type of an overridden method but a new method was introduced in JDK 5.0, called covariant where we could change the return type of the overridden method. The return type must be non-primitive. …
In this article, we will discuss static import in Java. Just as import statements are used to access a class without its package qualification. In a similar manner, static imports are used to access static members without their class qualification. Some basic static methods used with the class names are as follows: Math.sqrt(4): It is …
Generics in Java program was introduced in Java version 5. It is used to ensure the data type safety of objects. So, it constructs the code steady by detecting bugs at compile time. Why do we need generics in Java? When we write programs, errors occur. Some errors occur at run time while some errors …
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In this article, we will learn how to access variable from another class in java. There are two ways to get variables from another class. Create an object of another class in the main class Extend another class in the main class Let us take a look at both these methods one by one with …
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