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  Tutorial: Java General Java Interfaces Tutorial

An interface is like a public class that has only abstract and public methods. The variables declared in an interface are implicitly public, static, and final.

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Java Interfaces

An interface is like a public class that has only abstract and public methods. The variables declared in an interface are implicitly public , static , and final.

For instance:

interface MyInterface
{
void f();
}
class MyClass implements MyInterface
{
public void f() {}
}
A concrete class implementing an interface has to implement all the methods declared in it.

Interface methods are implicitly public and cannot be declared static . All the overriding rules are applicable for the implemented methods. A class can implement more than one interface.


 

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