程序填空题 分数 3 作者 邱颖豫 单位 许昌学院 补充代码，使程序运行结果如下: animal : eat dog : eat animal : eat 样例程序： class Animal { void eat() { System.out.println("animal : eat"); } } class Dog extends Animal { void eat() { System.out.println("dog : eat"); } void eatTest() { Dog a. eat(); Animal b. eat(); } } public class Test { public static void main(String[] args) { Animal a = new Animal(); a.eat(); Dog d = new Dog(); d.eatTest(); } } 程序填空题 分数 4 作者 邱颖豫 单位 许昌学院 程序填空。 输入样例： 小黄 小花 输出样例 ： 小黄: eat 小花: eat 样例程序： import java.util.Scanner; class Animal { abstract void eat(); } class Dog extends Animal { String name; public Dog(String name) { super(); this.name = name; } public String eat(String name){ return this.name+" eat"; } } public class Test { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String name = sc.next(); Animal a = new Animal() ; a.eat(); name = sc.next(); Dog d = new Dog() ; d.eat(); sc.close(); } } 程序填空题 分数 4 作者 邱颖豫 单位 许昌学院 程序填空。 输入样例： 小黄 小花 输出样例： 小黄: eat 小花: eat 样例程序： import java.util.Scanner; interface Eatable { void eat(); } class Dog implements Eatable { String name; public Dog(String name) { super(); this.name = name; } public String eat(){ return this.name+": eat"; } } public class Test { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String name = sc.next(); Eatable a = new Eatable(); a.eat(); name = sc.next(); Dog d = new Dog(name); d.eat(); sc.close(); } }

第一题：

填空代码：

Animal a = new Animal();
a.eat();
Dog d = new Dog();
d.eat();
((Animal)d).eat();

输出结果：

animal : eat
dog : eat 
animal : eat

第二题：

填空代码：

import java.util.Scanner;

abstract class Animal {
    abstract void eat();
}

class Dog extends Animal {
    String name;

    public Dog(String name) {
        super();
        this.name = name;
    }

    public void eat() {
        System.out.println(this.name + ": eat");
    }
}

public class Test {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String name = sc.next();
        Animal a = new Animal() {
            void eat() {
                System.out.println(name + ": eat");
            }
        };
        a.eat();
        name = sc.next();
        Dog d = new Dog(name);
        d.eat();
        sc.close();
    }
}

输出结果：

小黄: eat
小花: eat

第三题：

填空代码：

import java.util.Scanner;

interface Eatable {
    void eat();
}

class Dog implements Eatable {
    String name;

    public Dog(String name) {
        super();
        this.name = name;
    }

    public void eat() {
        System.out.println(this.name + ": eat");
    }
}

public class Test {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String name = sc.next();
        Eatable a = new Eatable() {
            public void eat() {
                System.out.println(name + ": eat");
            }
        };
        a.eat();
        name = sc.next();
        Dog d = new Dog(name);
        d.eat();
        sc.close();
    }
}

输出结果：

小黄: eat
小花: eat