PPT Slide

Interfaces

Interfaces provide a way to declare a type consisting only of abstract methods and constants, enabling any implementation to be written for those methods.

“An interface is an expression of pure design, where a class is a mix of design and implementation.”

Interface Attributed {

void add(String attrName, Attr newAttr);

Attr find(String attrName);

Attr remove(String attrName);

}

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