Person继承student的Java

代码如下：

public class Student {
    private String name;
    private int age;

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

    public void study() {
        System.out.println("I'm studying.");
    }
}

public class Person extends Student {
    private String gender;

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

    public void introduce() {
        System.out.println("My name is " + name + ", I'm " + age + " years old, and I'm " + gender + ".");
    }
}

在这个例子中，Person类继承了Student类，Person类拥有了Student类中的属性和方法，同时又增加了自己的属性和方法。在Person类的构造方法中，使用了super关键字调用了父类的构造方法。