java/W2/Student.java

// 1. 定义 Student 类
class Student {
    private String studentId;
    private String name;
    private double score;
    public Student(String studentId, String name, double score) {
        this.studentId = studentId;
        this.name = name;
        this.score = score;
    }

    public void study() {
        System.out.println("学生 " + name + " (学号: " + studentId + ") 正在努力学习！");
        System.out.println("他/她的当前分数是: " + score);
    }

    public String getStudentId() { return studentId; }
    public String getName() { return name; }
    public double getScore() { return score; }

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

public class StudentPractice {
    public static void main(String[] args) {
        Student student1 = new Student("S001", "张三", 88.5);
        Student student2 = new Student("S002", "李四", 92.0);

        System.out.println("--- 第一个学生的学习情况 ---");
        student1.study();

        System.out.println("\n--- 第二个学生的学习情况 ---");
        student2.study();

        System.out.println("\n--- 李四经过努力后 ---");
        student2.setScore(95.0);
        student2.study();
    }
}