JAVA | 2，

JAVA | 2，

package com.company;
//定义学生类
class Student {
    //定义属性值
    private int num;
    private int age;
    private String name;
    private String sclass;
    private String sex;
    //定义构造函数
    public Student(int num, int age, String name, String sclass, String sex) {
        this.num = num;
        this.age = age;
        this.name = name;
        this.sclass = sclass;
        this.sex = sex;
    }
    public Student() {
        this(0,0,"xx","xx","xx");
    }
    public Student(int num) {
        this(num,0,"xx","xx","xx");
    }
    public Student(int num, int age) {
        this(num,age,"xx","xx","xx");
    }
    public Student(int num,int age,String name) {
        this(num,age,name,"xx","xx");
    }
    public Student(int num,int age,String name,String sclass) {
        this(num,age,name,sclass,"xx");
    }
    //setter
    public void setNum(int num) {
        this.num = num;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void setSclass(String sclass) {
        this.sclass = sclass;
    }
    public void setSex(String sex) {
        this.sex = sex;
    }
    //getter
    public int getNum() {
        return this.num;
    }
    public int getAge() {
        return this.age;
    }
    public String getName() {
        return this.name;
    }
    public String getSclass() {
        return this.sclass;
    }
    public String getSex() {
        return this.sex;
    }
    //返回学生信息函数
    public String getInfo() {
        return "学号: " + this.num + "\n" +
                "年龄: " + this.age + "\n" +
                "姓名: " + this.name + "\n" +
                "班级: " + this.sclass + "\n" +
                "性别: " + this.sex + "\n";
    }
}
//主函数
public class Main {
    public static void main(String[] args) {
        //学生类对象实例化
        Student stu = new Student();
        //输出学生信息
        System.out.println(stu.getInfo());
    }
}