static的继承,静态方法只能继承,不能重写

public class Static {

public static void main(String[] args) {
A a = new A();
a.a();// a

A a1 = new B();
a1.a();// a
B a2 = new B();
a2.a();// b
}

}

class A {

public static void a() {
System.out.println("a");

}
}

class B extends A {
// 不能@Override,编译器会报错
public static void a() {
System.out.println("b");
}

}

annotation:类的加载情况以后会写到