Java定义Student类（包括姓名、学号、籍贯、出生日期、专业等属性，获取姓名、学号、籍贯、年龄和专业的实例方法，增加initStudents(int number)静态方法。

Question

刚开始学，这个怎么用java语言定义Student类（包括姓名、学号、籍贯、出生日期、专业等属性，获取姓名、学号、籍贯、年龄和专业的实例方法，增加initStudents(int number)静态方法，返回指定数量同学的数组，学号随机生成）

Answer 1

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import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * 定义Student类（包括姓名、学号、籍贯、出生日期、专业等属性，获取姓名、学号、籍贯、年龄和专业的实例方法，
 * 增加initStudents(int number)静态方法，返回指定数量同学的数组，学号随机生成）
 */
public class Student {

    private String no;

    private String name;

    private String nativePlace;

    private Date birthday;

    private String professional;

    public String getNo() {
        return no;
    }

    public void setNo(String no) {
        this.no = no;
    }

    public String getName() {
        return name;
    }

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

    public String getNativePlace() {
        return nativePlace;
    }

    public void setNativePlace(String nativePlace) {
        this.nativePlace = nativePlace;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public String getProfessional() {
        return professional;
    }

    public void setProfessional(String professional) {
        this.professional = professional;
    }

    @Override
    public String toString() {
        return "Student{" +
                "no='" + no + '\'' +
                ", name='" + name + '\'' +
                ", nativePlace='" + nativePlace + '\'' +
                ", birthday=" + birthday +
                ", professional='" + professional + '\'' +
                '}';
    }

    public static List<Student> initStudents(int number) {
        List<Student> students = new ArrayList<>(number);
        List<String> noList = new ArrayList<>();
        while (students.size() < number) {
            Student student = new Student();
            String no = assembleNo();
            if (!noList.contains(no)) {
                noList.add(no);
                student.setNo(no);
                student.setName("学生" + students.size());
                student.setProfessional("专业" + students.size());
                students.add(student);
            }
        }

        return students;
    }

    public static String assembleNo() {
        int len = 6;
        StringBuilder no = new StringBuilder();
        for (int i = 0; i < len; i++) {
            no.append((int) (Math.random() * 10));
        }

        return no.toString();
    }

    public static void main(String[] args) {
        List<Student> students = initStudents(6);
        for (Student student : students) {
            System.out.println(student.toString());
        }
    }
}