用java写一个学生类加上主类

下面是一个简单的学生类示例，包括学生的姓名、年龄、性别和成绩属性，以及一些基本的方法：

public class Student {
    private String name;
    private int age;
    private char gender;
    private double score;

    public Student(String name, int age, char gender, double score) {
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.score = score;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

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

    public char getGender() {
        return gender;
    }

    public void setGender(char gender) {
        this.gender = gender;
    }

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public String toString() {
        return "Name: " + name + ", Age: " + age + ", Gender: " + gender + ", Score: " + score;
    }
}

下面是一个简单的主类示例，该类创建了一个学生对象并打印学生信息：

public class Main {
    public static void main(String[] args) {
        Student s = new Student("Tom", 18, 'M', 85.5);
        System.out.println(s.toString());
    }
}

输出结果为：

Name: Tom, Age: 18, Gender: M, Score: 85.5