如何在 net.biancheng.c 包下，创建一个名为 Student 的类？

package net.biancheng.c;

import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory;

public class Student { private static final Log LOGGER = LogFactory.getLog(Student.class); private int id; private String name; private Grade grade;

public Student(int id, String name, Grade grade) {
    LOGGER.info("正在执行 Course 的有参构造方法，参数分别为：id=" + id + ",name=" + name + ",grade=" + grade);
    this.id = id;
    this.name = name;
    this.grade = grade;
}

@Override
public String toString() {
    return "Student{" +
            "id=" + id +
            ", name='" + name + '\'' +
            ", grade=" + grade +
            '}';
}

}