Implementation of methods in Interfaces with static and default keyword

Defining default method in interface - Java 8 allows implementation of methods in interface which are otherwise abstract. This is possible with keyword 'default' before methods. They are added to the interface to provide additional functionality to all implementing classes without requiring them to define the method.

Defining static methods in interface - Java 8 also allows to provide implementation of static methods in interface. Otherwise it is not possible to declare static methods in interface because in interface all the methods are abstract implicitly.Since static methods don’t belong to a particular object, they have to be called by using the interface name.
Please see this with following example:

public interface NewIF {
default public void social() {
System.out.println("I am default method from interface");
}
public void operate();
public void calculate();
public static void enquire() {
System.out.println("I am static enquiry from interface");
}
}

public class ClassOne implements NewIF {
@Override
public void operate() {
System.out.println("operate");
}
public static void main(String[] args) {
new ClassOne().social();
NewIF.enquire();
}
@Override
public void calculate() {
System.out.println("calculate");
}
}

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