Question 5 Design the Bird and Fish classes to inherit from the abstract class Animal, implement its abstract method info(), and output their information .
package com.homework.demo.test4_5;
/**
* animal
* @author suixin
*
*/
public abstract class Animal {
private int age; //age
/**
* no-argument constructor
*/
public Animal() {
super();
// TODO Auto-generated constructor stub
}
/**
* Construct with parameters
* @param age age
*/
public Animal(int age) {
super();
this.age = age;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
/**
* Abstract output information method
*/
public abstract void info();
}
package com.homework.demo.test4_5;
/**
* birds
* @author suixin
*
*/
public class Bird extends Animal {
private String color = "red"; //color
public String getColor() {
return color;
}
public void setColor(String color) {
this.color = color;
}
/**
* No-argument constructor
*/
public Bird() {
super();
// TODO Auto-generated constructor stub
}
/**
* Constructor with parameters
* @param age age
*/
public Bird(int age) {
super(age);
// TODO Auto-generated constructor stub
}
/**
* Override the parent class info() method
*/
@Override
public void info() {
// TODO Auto-generated method stub
System.out.println("I am a bird of "+this.color+"!\n"+"This year"+super.getAge()+" is old!\n");
}
}
package com.homework.demo.test4_5;
/**
* fish
* @author suixin
*
*/
public class Fish extends Animal {
private int swight = 5; //weight
public int getSwight() {
return swight;
}
public void setSwight(int swight) {
this.swight = swight;
}
/**
* No-argument constructor
*/
public Fish() {
super();
// TODO Auto-generated constructor stub
}
/**
* Constructor with parameters
* @param age age
*/
public Fish(int age) {
super(age);
// TODO Auto-generated constructor stub
}
/**
* Override the parent class info() method
*/
@Override
public void info() {
// TODO Auto-generated method stub
System.out.println("I am a "+this.swight+" heavy fish!\n"+"This year"+super.getAge()+" is old!\n\n");
}
}
package com.homework.demo.test4_5;
/**
* test class
* @author suixin
*
*/
public class Test {
public static void main(String[] args) {
// TODO Auto-generated method stub
Bird bird = new Bird(4); //The actual parameter of age is 4 to construct an object
bird.info();
Fish fish = new Fish(2); //The actual parameter of age is 4 to construct an object
fish.info();
}
}
Question 6 There are two poultry in the house: a chicken and a duck. Please describe it with the characteristics of object-oriented thinking of encapsulation and inheritance.
package com.homework.demo.test4_6;
/**
* animal
* @author suixin
*
*/
public abstract class Animal1 {
private String name; //姓名
private String strain; //variety
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStrain() {
return strain;
}
public void setStrain(String strain) {
this.strain = strain;
}
/**
* No-argument constructor
*/
public Animal1() {
super();
// TODO Auto-generated constructor stub
}
/**
* Constructor with parameters
* @param name name
* @param strain variety
*/
public Animal1(String name, String strain) {
super();
this.name = name;
this.strain = strain;
}
public abstract void print(); //Abstract method, output information
}
package com.homework.demo.test4_6;
/**
* Chicken
* @author suixin
*
*/
public class Chicken extends Animal1 {
/**
* No-argument constructor
*/
public Chicken() {
super();
// TODO Auto-generated constructor stub
}
/**
* Constructor with parameters
* @param name name
* @param strain variety
*/
public Chicken(String name, String strain) {
super(name, strain);
// TODO Auto-generated constructor stub
}
/**
* Override the parent class print() method
*/
@Override
public void print() {
// TODO Auto-generated method stub
System.out.println("My name is "+super.getName()+", it's a "+super.getStrain()+"\nI like to eat bugs!\nI will croak!\n");
}
}
package com.homework.demo.test4_6;
/**
* Duck
* @author suixin
*
*/
public class Duck extends Animal1 {
/**
* No-argument constructor
*/
public Duck() {
super();
// TODO Auto-generated constructor stub
}
/**
* Constructor with parameters
* @param name name
* @param strain variety
*/
public Duck(String name, String strain) {
super(name, strain);
// TODO Auto-generated constructor stub
}
/**
* Override the parent class print() method
*/
@Override
public void print() {
// TODO Auto-generated method stub
System.out.println("My name is "+super.getName()+", it's a "+super.getStrain()+"\nI like to eat small fish!\nI can swim!");
}
}
package com.homework.demo.test4_6;
/**
* test class
* @author suixin
*
*/
public class TestAnimal1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Chicken chicken = new Chicken("Ooh","Luhua chicken"); //Construct object with parameters
chicken.print(); //call the print method
Duck duck = new Duck("Quack","Spot-billed duck"); //Construct object with parameters
duck.print(); //call the print method
}
}