1定义一个Student 建立属性：学号名字和年龄并建立有参的构造方法。 2在该类中创建对象对象信息为：201000802011黎明 20 3重写toString方法显示该对象的信息。用Java

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

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

}

Student student = new Student("201000802011", "黎明", 20);

@Override public String toString() { return "学号：" + studentId + "，姓名：" + name + "，年龄：" + age; }

System.out.println(student.toString()); // 输出：学号：201000802011，姓名：黎明，年龄：20