JAVA Beginners 2017 Tutorial in interface #example

An interface is a reference type in Java. It is similar to class. It is a collection of abstract methods. A class implements an interface, thereby inheriting the abstract methods of the interface. Along with abstract methods, an interface may also contain constants, default methods, static methods, and nested types.
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// JAVA Beginners 2017 Tutorial in interface example


interface D
{
// Member - Static and Final
// Method - public and Abstract


void demo3();

}
interface I extends D
{
// Member - Static and Final
// Method - public and Abstract


int i=10;
void demo3();
void demo3();

}
interface J
{
void demo3();
}
class A implements D,I,J
{
public void demo3()
{
System.out.println("Demo-1");
System.out.println("I = "+i);

}

public void demo3()
{
System.out.println("Demo-2");

}

public void demo3()
{
System.out.println("Demo-3");

}
public void demo3()
{
System.out.println("Demo-4");

}

public static void main(String a[])
{
new A().demo3();
System.out.println("I = "+i);
}
}

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