อินเทอร์เฟซสามารถมีวิธีช่วยเหลือแบบสแตติกตั้งแต่ Java 8 เป็นต้นไป
public interface vehicle {
default void print() {
System.out.println("I am a vehicle!");
}
static void blowHorn() {
System.out.println("Blowing horn!!!");
}
} ตัวอย่าง
public class Java8Tester {
public static void main(String args[]) {
Vehicle vehicle = new Car(); vehicle.print();
}
}
interface Vehicle {
default void print() {
System.out.println("I am a vehicle!");
}
static void blowHorn() {
System.out.println("Blowing horn!!!");
}
}
interface FourWheeler {
default void print() {
System.out.println("I am a four wheeler!");
}
}
class Car implements Vehicle, FourWheeler {
public void print() {
Vehicle.super.print();
FourWheeler.super.print();
Vehicle.blowHorn();
System.out.println("I am a car!");
}
} ผลลัพธ์
I am a vehicle! I am a four wheeler! Blowing horn!!! I am a car!
