Java Language Tutorial => Accessing other interface methods within...

Example

You can as well access other interface methods from within your default method.

public interface Summable {
    int getA();

    int getB();

    default int calculateSum() {
        return getA() + getB();
    }
}

public class Sum implements Summable {
    @Override
    public int getA() {
        return 1;
    }

    @Override
    public int getB() {
        return 2;
    }
}

The following statement will print 3:

System.out.println(new Sum().calculateSum());

Default methods could be used along with interface static methods as well:

public interface Summable {
    static int getA() {
        return 1;
    }

    static int getB() {
        return 2;
    }

    default int calculateSum() {
        return getA() + getB();
    }
}

public class Sum implements Summable {}

The following statement will also print 3:

System.out.println(new Sum().calculateSum());

PDF - Download Java Language for free

Previous Next

Java Language

Fastest Entity Framework Extensions

Example

Got any Java Language Question?

Java Language

Java Language Default Methods Accessing other interface methods within default method

Fastest Entity Framework Extensions

Example

Got any Java Language Question?