接口中的Java 8静态方法
从Java8开始，接口也可以具有静态帮助器方法。
public interface vehicle {
default void print() {
System.out.println("我是车！");
}
static void blowHorn() {
System.out.println("Blowing horn!!!");
}
}示例
public class Java8Tester {
public static void main(String args[]) {
Vehicle vehicle = new Car(); vehicle.print();
}
}
interface Vehicle {
default void print() {
System.out.println("我是车！");
}
static void blowHorn() {
System.out.println("Blowing horn!!!");
}
}
interface FourWheeler {
default void print() {
System.out.println("我是四轮车！");
}
}
class Car implements Vehicle, FourWheeler {
public void print() {
Vehicle.super.print();
FourWheeler.super.print();
Vehicle.blowHorn();
System.out.println("我是车！");
}
}输出结果
我是车！ 我是四轮车！ Blowing horn!!! 我是车！