分析学生类和教师类，找到老师类和学生类当中的共性内容，抽取出一个父类，用继承的方式编写一个父类(Person), 两个子类:学生类（Student）和教师类（Teacher）；用java写

以下是Java代码：

public class Person {
    private String name;
    private int age;
    private String gender;

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

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

public class Student extends Person {
    private int grade;
    private String major;

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

    public void study() {
        System.out.println("I am studying " + major + " in grade " + grade + ".");
    }
}

public class Teacher extends Person {
    private String subject;
    private String title;

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

    public void teach() {
        System.out.println("I am teaching " + subject + " as a " + title + ".");
    }
}

在这个例子中，我们发现学生类和教师类都有姓名、年龄和性别这三个属性，因此我们将它们抽象出来成为父类Person。学生类和教师类分别继承了父类Person，同时又有各自的特有属性和方法。通过继承，我们可以减少代码的重复，并且方便后续的修改和维护。