求java 程序

定义一个学生的类 Student，包括成员变量“学号”、“班号”、“姓名”、“性别”、“年龄” ；成员方法：“获得学号”、“获得班号”、“获得性别”、“获得姓名”、“获得年龄”。请为 Student 类定义构造函数初始化所有的成员变量。增加一个方法 public String toString()把 Student 类对象的所有信息组合成一个字符串。
编写测试类，创建学生类对象，调用toString()将该对象的所有信息在屏幕上进行显示。

public class Student {
public String name;
public String sex;
public int age;
public String stu_num;
public String class_num;

public Student(){

}
public Student(String name,String sex,int age,String stu_num,String class_num){
    this.name = name;
    this.sex = sex;
    this.age = age;
    this.stu_num = stu_num;
    this.class_num = class_num;

}
public String getSex() {
    return sex;
}
public void setName(String name) {
    this.name = name;
}
public void setAge(int age) {
    this.age = age;
}
public void setStu_num(String stuNum) {
    stu_num = stuNum;
}
public void setClass_num(String classNum) {
    class_num = classNum;
}

public String toString(){
    return "name:"+this.name+"sex: "+this.sex+"age: "+this.age+"stu_num: "+this.stu_num+"class_num: "+this.class_num;
}

public static void main(String args[]){
    Student s = new Student("1","2",3,"4","5");
    System.out.println(s.toString());
}

}

自己动手，丰衣足食。 :idea: :idea: :idea: