多态的继承与清理问题
代码有点长 请打下耐心帮忙啊
package polymorphism;//import static net.mindview.util.Print.*;class Characteristic { private String s; Characteristic(String s) { this.s = s; System.out.println("Creating Characteristic " + s); } protected void dispose() { System.out.println("disposing Characteristic " + s); }}class Description { private String s; Description(String s) { this.s = s; System.out.println("Creating Description " + s); } protected void dispose() { System.out.println("disposing Description " + s); }}class LivingCreature { private Characteristic p = new Characteristic("is alive"); private Description t = new Description("Basic Living Creature"); LivingCreature() { System.out.println("LivingCreature()"); } protected void dispose() { print("LivingCreature dispose"); t.dispose(); p.dispose(); }}class Animal extends LivingCreature { private Characteristic p = new Characteristic("has heart"); private Description t = new Description("Animal not Vegetable"); Animal() { System.out.println("Animal()"); } protected void dispose() { System.out.println("Animal dispose"); t.dispose(); p.dispose(); super.dispose(); }}class Amphibian extends Animal { private Characteristic p = new Characteristic("can live in water"); private Description t = new Description("Both water and land"); Amphibian() { System.out.println("Amphibian()"); } protected void dispose() { System.out.println("Amphibian dispose"); t.dispose(); p.dispose(); super.dispose(); }}public class Frog extends Amphibian { private Characteristic p = new Characteristic("Croaks"); private Description t = new Description("Eats Bugs"); public Frog() { System.out.println("Frog()"); } protected void dispose() { System.out.println("Frog dispose"); t.dispose(); p.dispose(); super.dispose(); } public static void main(String[] args) { Frog frog = new Frog(); System.out.println("Bye!"); frog.dispose(); }}