Abstract Class Vs Interface Ppt

An abstract class can extend another concrete regular class or abstract class.

Abstract class vs interface ppt. Abstract class can have variable declaration and method implementationdeclarations. You cannot instantiate them and they may contain a mix of methods declared with or without an implementation. Interface can only contain methods. No fields can be defined.

1 abstract class can have abstract and non abstract methods. Otherwise this class also needs to be defined as abstract. An abstract class can inherit a class and multiple interfaces. An abstract class defines the core identity of a class and there it is used for related objects.

The class which implements an interface must implement all the methods of the interface. Abstract classes compared to interfaces abstract classes are similar to interfaces. Interfaces are used to define the peripheral abilities of a class. Interface supports multiple inheritance.

An interface can extend any number of interfaces at a time. An interface can only extend another interface. An abstract class can contain access modifiers for the methods properties etc. Abstract class can contain methods fields constants etc.

The class that is fully abstract is called an interface. In other words both human and vehicle can inherit from a imovable interface. An abstract class defines the identity of a class. Interface can have only abstract methods.

In other words both human and vehicle can inherit from a imovable interface. Any class that implements this interface must use implements keyword and all the methods that are declared in the class must be defined here. Multiple inheritances is possible only in the case of interface. If many implementations are of the same kind and use common behavior then it is superior to use abstract class.

An interface can inherit multiple interfaces but cannot inherit a class. An abstract class can extend only one class or one abstract class at a time. An abstract class defines the core identity of a class and there it is used for objects of the same type. Peripheral interfaces are used to define the peripheral abilities of a class.

If many implementations only share methods then it is superior to use interface.