Abstract class or an interface : JAVA?

I have one common method which i need to use in several classes with just a single call from the calling class. So what i see is i can call it in two ways.

public abstract class TestAbstractClass {
    void commonMethod(){
        System.out.println("Calling common method : TestAbstractClass");
    }
}

calling class:

public class RunApplication extends TestAbstractClass{

    public void testMethod(){
        commonMethod();
    }
}

[OR]

Using Java 8 feature of default method in interface.

public interface TestInterface {
    default void commonMethod(){
        System.out.println("Calling common method : TestInterface");
    }
}

calling class:

public class RunApplication implements TestInterface{

    public void testMethod(){
        commonMethod();
    }
}

They both works fine for me, But what is better approach, an abstract class with non-abstract method OR Interface with default method.