继承封装练习题:鱼类鸟类动物类,抽出动物类的年龄和自我介绍,鱼类的重量和游泳的方法,鸟类的颜色和飞的方法

参考代码:

public class Animal { //父类
    private int age;

    //get set方法
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }


    public Animal() { //无参构造
        super();
    }   
    public Animal(int age) { //有参构造
        super();
        this.age = age;
    }


    //自我介绍
    public String introduce(){
        return "这是自我介绍的方法";
    }


}



public class Bird extends Animal{ //继承
    private String color;

    //get set方法
    public String getColor() {
        return color;
    }
    public void setColor(String color) {
        this.color = color;
    }


    public Bird() { //无参构造
        super();
    }
    public Bird(int age, String color) { //有参构造
        super(age);
        this.color = color;
    }



    //自我介绍
    public String introduce(){
        return "我是一只"+color+"的鸟!\n今年"+super.getAge()+"岁了!\n"+this.fly();
    }

    public String fly(){
        return "我展翅高翔";
    }


}



public class Fish extends Animal{ //继承
    private double weight;

    //get set方法
    public double getWeight() {
        return weight;
    }
    public void setWeight(double weight) {
        this.weight = weight;
    }

    public Fish() { //无参构造
        super();
    }
    public Fish(int age, double weight) { //有参构造
        super(age);
        this.weight = weight;
    }

    //自我介绍
    public String introduce(){
        return "我是一只"+weight+"斤重的鱼!\n今年"+super.getAge()+"岁了!\n"+this.swim();
    }

    public String swim(){
        return "我在水里游泳吐泡";
    }


}



public class Test { //测试类
    public static void main(String[] args) {
        Bird b=new Bird(4,"红色"); //创建对象
        System.out.println(b.introduce()); //调用自我介绍的方法 并将String类型的结果打印输出
        System.out.println("================");
        Fish f=new Fish(2,5); //创建对象
        System.out.println(f.introduce()); //调用自我介绍的方法 并将String类型的结果打印输出

    }
}