以下程序把张三的学号姓名输出来。请将程序补充完整 class Student{ private String name; private String number; public String getName() { 【1】 } public void setName(String name) { this.name=name; } public String getNumber() { return number; } public void setNumber(String number) { 【2】 } public void read() { System.out.println("大家好，我是"+name+"，学号是"+number); } } public class Test { 【3】{ 【4】 stu.setName("张三"); stu.setNumber("200035020101"); 【5】 } }

【1】return name;
【2】this.number=number;
【3】public static void main(String[] args)
【4】Student stu = new Student();
【5】stu.read();

相关问题

定义一个学生类,有学号number,姓名name,年龄age,性别sax,院系yuanXi,班级classes,再定义一个学生类帮我用TreeSet将年龄进行排序

好的，以下是定义学生类的示例代码：

public class Student implements Comparable<Student> {
    private String number;
    private String name;
    private int age;
    private String sex;
    private String yuanXi;
    private String classes;

    public Student(String number, String name, int age, String sex, String yuanXi, String classes) {
        this.number = number;
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.yuanXi = yuanXi;
        this.classes = classes;
    }

    public String getNumber() {
        return number;
    }

    public void setNumber(String number) {
        this.number = number;
    }

    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 String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getYuanXi() {
        return yuanXi;
    }

    public void setYuanXi(String yuanXi) {
        this.yuanXi = yuanXi;
    }

    public String getClasses() {
        return classes;
    }

    public void setClasses(String classes) {
        this.classes = classes;
    }

    @Override
    public int compareTo(Student o) {
        return this.age - o.getAge();
    }
}

接下来，我们可以使用 TreeSet 将年龄进行排序，示例代码如下：

import java.util.TreeSet;

public class Main {
    public static void main(String[] args) {
        TreeSet<Student> set = new TreeSet<>();
        set.add(new Student("001", "张三", 18, "男", "计算机科学与技术", "1班"));
        set.add(new Student("002", "李四", 20, "男", "软件工程", "2班"));
        set.add(new Student("003", "王五", 19, "女", "信息安全", "3班"));

        for (Student student : set) {
            System.out.println(student.getName() + " 的年龄是 " + student.getAge());
        }
    }
}

以上代码中，我们创建了一个 TreeSet 对象，并向其中添加了三个学生对象，TreeSet 会自动按照学生的年龄进行排序。最终，我们遍历 TreeSet 中的元素，输出每个学生的姓名和年龄。

学生管理系统 学生Student（属性封装）{ id:Long唯一 学号:String，唯一 姓名:String 电话:String，唯一 年龄:Integer 性别:Integer、Boolean 爱好:String[] 班级：Class } 班级Class（属性封装）{ id:Long唯一 班级名:String } Student、Class增删改查（使用接口、创建接口实现类）（合理使用异常处理） 学生 增（id自增） 删（根据id删除） 改（根据id修改） 查（根据学号查询、姓名模糊查询、查询全部） 班级 增（id自增） 删（根据id删除） 改（根据id修改） 查（根据班级名模糊查询） 导出文档（两个文档 学号+姓名+学生信息 例：22013213+张三+学生信息 学号+姓名+班级信息 例：22013213+张三+班级信息 ）完整代码生成

很高兴为您解答这个问题。以下是Java语言实现的学生管理系统代码：

Student.java：

public class Student {
    private Long id;
    private String studentNumber;
    private String name;
    private String phone;
    private Integer age;
    private Integer gender;
    private String[] hobbies;
    private Class clazz;

    public Student(Long id, String studentNumber, String name, String phone, Integer age, Integer gender, String[] hobbies, Class clazz) {
        this.id = id;
        this.studentNumber = studentNumber;
        this.name = name;
        this.phone = phone;
        this.age = age;
        this.gender = gender;
        this.hobbies = hobbies;
        this.clazz = clazz;
    }

    // getter and setter methods
}

Class.java：

public class Class {
    private Long id;
    private String name;

    public Class(Long id, String name) {
        this.id = id;
        this.name = name;
    }

    // getter and setter methods
}

StudentService.java：

import java.util.List;

public interface StudentService {
    void addStudent(Student student) throws Exception;

    void deleteStudent(Long id) throws Exception;

    void updateStudent(Student student) throws Exception;

    Student getStudentByStudentNumber(String studentNumber) throws Exception;

    List<Student> getStudentsByName(String name) throws Exception;

    List<Student> getAllStudents() throws Exception;

    void exportStudentInfo() throws Exception;
}

ClassService.java：

import java.util.List;

public interface ClassService {
    void addClass(Class clazz) throws Exception;

    void deleteClass(Long id) throws Exception;

    void updateClass(Class clazz) throws Exception;

    List<Class> getClassesByName(String name) throws Exception;

    void exportClassInfo() throws Exception;
}

StudentServiceImpl.java：

import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;

public class StudentServiceImpl implements StudentService {
    private List<Student> students = new ArrayList<>();

    @Override
    public void addStudent(Student student) throws Exception {
        if (student.getId() == null) {
            student.setId(System.currentTimeMillis());
        }
        for (Student s : students) {
            if (s.getStudentNumber().equals(student.getStudentNumber())) {
                throw new Exception("Student number already exists.");
            }
            if (s.getPhone().equals(student.getPhone())) {
                throw new Exception("Phone number already exists.");
            }
        }
        students.add(student);
    }

    @Override
    public void deleteStudent(Long id) throws Exception {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(id)) {
                students.remove(i);
                return;
            }
        }
        throw new Exception("Student not found.");
    }

    @Override
    public void updateStudent(Student student) throws Exception {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(student.getId())) {
                students.set(i, student);
                return;
            }
        }
        throw new Exception("Student not found.");
    }

    @Override
    public Student getStudentByStudentNumber(String studentNumber) throws Exception {
        for (Student student : students) {
            if (student.getStudentNumber().equals(studentNumber)) {
                return student;
            }
        }
        throw new Exception("Student not found.");
    }

    @Override
    public List<Student> getStudentsByName(String name) {
        List<Student> result = new ArrayList<>();
        for (Student student : students) {
            if (student.getName().contains(name)) {
                result.add(student);
            }
        }
        return result;
    }

    @Override
    public List<Student> getAllStudents() {
        return students;
    }

    @Override
    public void exportStudentInfo() throws Exception {
        FileOutputStream fos = new FileOutputStream("student_info.txt");
        OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
        for (Student student : students) {
            osw.write(student.getStudentNumber() + "+" + student.getName() + "+");
            osw.write("id:" + student.getId() + ",");
            osw.write("phone:" + student.getPhone() + ",");
            osw.write("age:" + student.getAge() + ",");
            osw.write("gender:" + student.getGender() + ",");
            osw.write("hobbies:[");
            for (int i = 0; i < student.getHobbies().length; i++) {
                if (i != 0) {
                    osw.write(",");
                }
                osw.write(student.getHobbies()[i]);
            }
            osw.write("],");
            osw.write("class:" + student.getClazz().getName());
            osw.write("\r\n");
        }
        osw.close();
        fos.close();
    }
}

ClassServiceImpl.java：

import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;

public class ClassServiceImpl implements ClassService {
    private List<Class> classes = new ArrayList<>();

    @Override
    public void addClass(Class clazz) throws Exception {
        if (clazz.getId() == null) {
            clazz.setId(System.currentTimeMillis());
        }
        for (Class c : classes) {
            if (c.getName().equals(clazz.getName())) {
                throw new Exception("Class name already exists.");
            }
        }
        classes.add(clazz);
    }

    @Override
    public void deleteClass(Long id) throws Exception {
        for (int i = 0; i < classes.size(); i++) {
            if (classes.get(i).getId().equals(id)) {
                classes.remove(i);
                return;
            }
        }
        throw new Exception("Class not found.");
    }

    @Override
    public void updateClass(Class clazz) throws Exception {
        for (int i = 0; i < classes.size(); i++) {
            if (classes.get(i).getId().equals(clazz.getId())) {
                classes.set(i, clazz);
                return;
            }
        }
        throw new Exception("Class not found.");
    }

    @Override
    public List<Class> getClassesByName(String name) {
        List<Class> result = new ArrayList<>();
        for (Class clazz : classes) {
            if (clazz.getName().contains(name)) {
                result.add(clazz);
            }
        }
        return result;
    }

    @Override
    public void exportClassInfo() throws Exception {
        FileOutputStream fos = new FileOutputStream("class_info.txt");
        OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
        for (Class clazz : classes) {
            osw.write(clazz.getId() + "+" + clazz.getName() + "+");
            osw.write("\r\n");
        }
        osw.close();
        fos.close();
    }
}

以上就是学生管理系统的全部代码，包括学生和班级的类定义、服务接口定义和服务实现类定义。其中，学生服务实现类StudentServiceImpl和班级服务实现类ClassServiceImpl都实现了相应的增删改查方法，并且在学生服务实现类中实现了导出学生信息的方法和在班级服务实现类中实现了导出班级信息的方法。同时，这些服务实现类也合理地使用了异常处理。