编写程序描述兔子和青蛙

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编写程序描述兔子和青蛙 需求说明：使用抽象类的思想，描述兔子和青蛙。

实现思路及关键代码 ** 1)分析兔子和青蛙的共性 2)根据共性，定义抽象的动物类 属性：名字、颜色、类别（哺乳类、非哺乳类） 方法：吃饭，发出叫声 3)根据青蛙会游泳 抽象游泳的接口 方法：游泳 4)定义兔子继承动物类，青蛙继承动物同时实现游泳接口 程序运行结果如图所示。 //测试文档 public class Test { public static void main(String[] args) { Animal rabbit = new Rabbit(“美人”, “黑色”, “哺乳类”); System.out.println(rabbit); rabbit.shout(); rabbit.eat(); System.out.println("-------------------------------------"); Animal frog = new Frog(“大兵”, “绿色”, “非哺乳类”); System.out.println(frog); frog.shout(); frog.eat(); Swim frog2 = new Frog(); frog2.swim(); } }

//定义抽象方法Animal public abstract class Animal { private String name; private String color; private String category; public abstract void eat(); public abstract void shout();

public Animal(String name, String color, String category) { this.name = name; this.color = color; this.category = category; } public Animal() { } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getColor() { return color; } public void setColor(String color) { this.color = color; } public String getCategory() { return category; } public void setCategory(String category) { this.category = category; }

} //定义接口Swim public interface Swim { void swim(); } //定义兔子类 public class Rabbit extends Animal { public Rabbit() { } public Rabbit(String name, String color, String category) { super(name, color, category); } @Override public void eat() { System.out.println(“兔子是” + getCategory() + “，爱吃胡萝卜”); } @Override public void shout() { System.out.println(“正在叽叽的叫”); } public String toString() { return “那只” + getColor() + “的，名叫” + getName() + “的兔子正在”; } } //定义青蛙类 public class Frog extends Animal implements Swim{ public Frog(String name, String color, String category) { super(name, color, category); } public Frog() { } @Override public void eat() { System.out.println(“青蛙是”+getCategory()+"，爱吃昆虫"); } @Override public void shout() { System.out.println(“正在呱呱的叫”); } public String toString() { // return “那只”+super.getColor()+“的，名叫”+super.getName()+“的兔子”+; return “那只” + super.getColor() + “的，名叫” + super.getName() + “的青蛙”; } @Override public void swim() { System.out.println(“虽然不是鱼，但青蛙也是泳坛高手”); } }