Java记录--简单的继承

设计动物类Animal，要求如下：

(1)protected的成员变量包括名称name、年龄age、性别sex、腿的数量legNum、体重weight；

(2)定义空构造方法，定义能够初始化所有成员变量的构造方法；

(3)setter和getter方法；

(4)功能方法包括：protected方法eating(String food)；重写Object类的toString()方法返回Animal对象的所有成员变量。

Pig类继承了Animal，Pig类的要求如下：

(1)成员变量有长度length，高度height和颜色color；

(2)定义构造方法能够初始化所有成员变量；

(3)setter和getter方法；

(4)功能方法包括：重写toString()方法返回Pig对象的所有成员变量；重写eating(String food)方法，food只能是Pig可以吃的食物；定义成员方法walking()表示Pig可以行走。

Chicken类继承Animal，Chicken类的要求如下：

(1)成员变量有鸡冠颜色combColor；

(2)定义构造方法能够初始化所有成员变量；

(3)省略setter和getter方法；

(4)功能方法有：重写toString()方法返回Chicken对象的所有成员变量，重写eating(String food)方法输出吃的动作和食物，定义成员方法flying()表示鸡可以飞。

定义测试类，完成如下任务：
package test1;

public class Animal {
    protected String name;
    protected int age;
    protected String sex;
    protected int legNum;
    protected double weight;
    Animal(){
        
    }//空
    public  Animal(String name,int age,String sex,int legNum,double weight){
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.legNum = legNum;
        this.weight = weight;     
    }
    protected String eating (String food) {
        return food;
    }
    public String toString() {
        return "name="+name+","+"age="+age+","+"sex="+sex+","+"legNum"+legNum+","+"weight="+weight;
    }
    public String getname() {
        return name;
    }
    public int getage() {
        return age;
    }
    public String getsex(){
        return sex;
    }
    public int getleg() {
        return legNum;
    }
    public double geiweight() {
        return weight;
    }
    public void setname(String name) {
        this.name = name;
    }
    public void setweight(double weight) {
        this.weight = weight;
    }
    public void setsex(String sex) {
        this.sex = sex;
    }
    public void setage(int age) {
        this.age = age;
    }
    public void setleg(int legNum) {
        this.legNum = legNum;
    }
}

package test1;
import test1.Animal;
public class Pig extends Animal{
   public double length;
   public double height;
   public String color;
   Pig(){
       
   }
   Pig(String name,int age,String sex,int legNum,double weight,double length,double height,String color){
    this.name = name;
       this.age = age;
       this.sex = sex;
       this.legNum = legNum;
       this.weight = weight;     
       this.length = length;
       this.height = height;
       this.color = color;
   }
   public String toString() {
       return "name="+name+","+"age="+age+","+"sex="+sex+","+"legNum"+legNum+","+"weight="+weight+"length="+length
               +","+"height="+height+","+"color="+color;
   }
   protected String eating (String food) {
        return "给"+name+"猪吃："+food;
   }
   public String walking() {
       return name+"在行走";
   }
   public String getcolor() {
       return color;
   }
   public double getheight() {
       return height;
   }
   public double getlength() {
       return length;
   }
   public void setcolor(String color) {
       this.color = color;
   }
   public void setlength(double length) {
       this.length = length;
   }
   public void setheight(double height) {
       this.height = height;
   }
}

package test1;

public class Chicken extends Animal {
    public String combColor;
    Chicken(){
        
    }
    public  Chicken(String name,int age,String sex,int legNum,double weight,String combColor){
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.legNum = legNum;
        this.weight = weight;     
        this.combColor = combColor;
    }
     public String toString() {
            return "name="+name+","+"age="+age+","+"sex="+sex+","+"legNum"+legNum+","+"weight="+weight
                    +","+"combColor="+combColor;
        }
     protected String eating (String food) {
            return "鸡啄食"+food;
        }
     public String flying() {
         return "鸡可以飞";
     }
}

package test1;

public class test1 {
    public static void main(String args[]) {
   Pig pig = new Pig("peiqi",20,"女",2,200.7,100.5,120,"粉红色");
   Chicken chicken =  new Chicken("xhj",12,"雄性",2,3,"红色");
   String p1 = pig.toString();//创建对象 
   String p2 = pig.eating("白菜");
   String p3 = pig.walking();
   System.out.println(p1);
   System.out.println(p2);
   System.out.println(p3);
   String c1 = chicken.toString();//创建对象 
   String c2 = chicken.eating("虫子");
   String c3 = chicken.flying();
   System.out.println(c1);
   System.out.println(c2);
   System.out.println(c3);
    }
}