续写代码public abstract class Animal { private String name; public Animal(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } public abstract void makeSound(); } // 包 animal package animal; public class Cat extends Animal { private int age; public Cat(String name, int age) { super(name); this.age = age; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public void makeSound() { System.out.println("Meow"); } } public class Dog extends Animal { private String breed; public Dog(String name, String breed) { super(name); this.breed = breed; } public String getBreed() { return breed; } public void setBreed(String breed) { this.breed = breed; } @Override public void makeSound() { System.out.println("Woof"); } } public class Elephant extends Animal { private int weight; public Elephant(String name, int weight) { super(name); this.weight = weight; } public int getWeight() { return weight; } public void setWeight(int weight) { this.weight = weight; } @Override要求0.必须有抽象父类，且被继承 1.必须包含 >=2 个包2.必须创建 >=5 个类(其中包含抽象父类)3.类中属性皆为私有属性，需定义读写方法 4.子类需要重写个别父类方法

续写代码：

// 包 animal
package animal;

public abstract class Animal {
private String name;

public Animal(String name) {
this.name = name;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public abstract void makeSound();
}

public class Cat extends Animal {
private int age;

public Cat(String name, int age) {
super(name);
this.age = age;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

@Override
public void makeSound() {
System.out.println("Meow");
}
}

public class Dog extends Animal {
private String breed;

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

public String getBreed() {
return breed;
}

public void setBreed(String breed) {
this.breed = breed;
}

@Override
public void makeSound() {
System.out.println("Woof");
}
}

public class Elephant extends Animal {
private int weight;

public Elephant(String name, int weight) {
super(name);
this.weight = weight;
}

public int getWeight() {
return weight;
}

public void setWeight(int weight) {
this.weight = weight;
}

@Override
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