concrete method in abstract class and default method in interface having the same name

Question

I have declared the default method and concrete method in the abstract class with the same name.

public class AbstractClassDefaultMethodTest   {
    public static void main(String[] args) {
        DemoInterface testDefaultMethods=new TestDefaultMethods();
        testDefaultMethods.display();
    }
}
abstract class DemoClass{

    public void display()
    {
        System.out.println("Inside display method of abstract class");
    }
}

interface DemoInterface{

    public default void display()
    {
        System.out.println("Inside display method of interface");
    }
}

class TestDefaultMethods extends DemoClass implements DemoInterface
{

}

Why the concrete method of abstract class is getting called? Why we are not getting the compile time error, as both the method names are same ?