创建Children类java

创建一个名为"Children"的Java类，通常包含一个或多个子类，可以代表有共同特性的孩子群体，例如学生、运动员等。下面是一个简单的示例，展示了如何创建一个基础的Children类和两个子类：

// Children 类作为基类或抽象类
public abstract class Children {
    private String name;
    protected int age;

    // 构造函数
    public Children(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // 获取和设置名字的方法
    public String getName() {
        return name;
    }

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

    // 返回年龄的方法
    public int getAge() {
        return age;
    }

    // 抽象方法，每个子类需要实现
    public abstract void play();
}

// 子类1 - Student
public class Student extends Children {
    private String grade;

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

    @Override
    public void play() {
        System.out.println(getName() + " is studying in grade " + grade);
    }
}

// 子类2 - Athlete
public class Athlete extends Children {
    private String sport;

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

    @Override
    public void play() {
        System.out.println(getName() + " is playing " + sport);
    }
}

// 主程序部分
public class Main {
    public static void main(String[] args) {
        Student student = new Student("Alice", 10, "5th");
        student.play(); // 输出: Alice is studying in grade 5th

        Athlete athlete = new Athlete("Bob", 12, "Basketball");
        athlete.play(); // 输出: Bob is playing Basketball
    }
}

在这个例子中，Children是抽象的，它的`play()`方法被声明为抽象方法，子类Student和Athlete都实现了这个方法。这展示了多态的一个基本应用。