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Method Binding in Java

Java, a versatile and item-oriented programming language, employs an idea referred to as approach binding. Method binding refers to the process of connecting a way name to the actual technique implementation. There are types of method binding in Java: static binding and dynamic binding.

What is method binding?

Connecting a method call to a method body is called binding. All method binding in Java uses late binding (dynamic binding or runtime binding or name binding) unless the method is static or final.

Dynamic Binding

Dynamic binding, additionally referred to as late binding, takes place at runtime. It affords extra flexibility because the technique call is attached to the approach implementation at some stage in software execution. One of the key mechanisms for accomplishing dynamic binding in Java is thru approach overriding.


Dog barks

In this case, we have a base elegance Animal with a method sound(), and a derived class Dog that overrides the sound() method. During runtime, an item of the Dog magnificence is created and assigned to a reference of type Animal. The approach name sound() is dynamically bound to the overridden approach inside the Dog class.

Here, the technique name is dynamically sure to the Dog elegance's sound() method at runtime.

Static Binding

Static binding, also known as early binding, occurs for the duration of assemble-time. It is easy and entails connecting a way name to the corresponding technique implementation at compile-time. Let's delve right into a simple example to illustrate static binding.


Static Binding Example

In this situation, the show technique is called at the item obj. The connection among the technique call and its implementation is established at collect-time.

Here, the technique call is certain to the show approach throughout compilation.

Polymorphism and Method Binding

Polymorphism, an essential concept in item-oriented programming, is carefully associated with dynamic binding. Polymorphism permits items of various sorts to be handled as gadgets of a not unusual kind. Dynamic binding permits the invocation of the appropriate technique based totally on the real form of the object at runtime.


Drawing a circle
Drawing a square

In this example, the Shape class has a method draw, and the Circle and Square training override this approach. At runtime, gadgets of the derived lessons are created and assigned to references of the bottom class. The draw() method is dynamically bound to an appropriate implementation based totally at the actual kind of the object.

Here, dynamic binding permits polymorphic behaviour, allowing distinctive implementations of the draw method to be invoked based totally on the actual kind of the object.

Considerations for Choosing Binding Types

Choosing between static and dynamic binding relies upon at the particular requirements and layout goals of a Java software. Here are some considerations:

Compile-Time Efficiency: Static binding is greater green at compile-time, making it suitable for eventualities wherein performance at some point of compilation is vital.

Flexibility and Polymorphism: Dynamic binding, related to method overriding and interfaces, gives extra flexibility and supports polymorphic behavior. It is beneficial whilst handling diverse and extensible object hierarchies.

Code Maintainability: Dynamic binding enhance code maintainability with the aid of allowing builders to increase and regulate the conduct of a machine without changing current code.

Dynamic Binding for Code Evolution: Dynamic binding plays a vast position in supporting code evolution and maintenance. When designing systems that want to evolve through the years, dynamic binding lets in for the addition of latest capability thru approach overriding or interface implementation without editing existing code.

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