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A class can implement more than one interface at a time. A class can extend only one class, but implement many interfaces. An interface can extend another interface, in a similar way as a class can extend another class.
A class implementation of a method takes precedence over a default method. So, if the class already has the same method as an Interface, then the default method from the implemented Interface does not take effect. However, if two interfaces implement the same default method, then there is a conflict.
An interface in Java is a mechanism which we mainly use to achieve abstraction and multiple inheritances in Java. An interface provides a set of specifications that other classes must implement. We can implement multiple Java Interfaces by a Java class. All methods of an interface are implicitly public and abstract.
Use a , to separate the interfaces you want to implement. That gives the following class declaration :
class generics <T> implements first, second
Here is the complete code :
interface first {
name: string,
age: number
}
interface second {
product: string,
available: boolean,
amount: number
}
class generics <T> implements first, second {
name: string;
age: number;
product: string;
available: boolean;
amount: number;
}
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