📅  最后修改于: 2022-03-11 14:53:28.424000             🧑  作者: Mango
class Top {
public Top() { System.out.println(“Top”); }
}
class Middle extends Top {
public Middle() { System.out.println(“Middle()”); }
}
class Bottom extends Middle {
public Bottom() { System.out.println(“Bottom()”); }
}
public class Level {
public static void main(String[] args) {
new Bottom();
}
}