作业-----改进后的类与对象学生题目

public class Test3
{
    public static void main(String[] args)
    {
        Student s1=new Student(10,"貂蝉",18);
        Student s2=new Student(11,"西施",17);
        Student s3=new Student(-12,"刘欢",-18);
        s2.setNumber(-10);
        System.out.println(s1.getInfo());
        System.out.println(s2.getInfo());
        System.out.println(s3.getInfo());
    }
}

class Student
{
    private int number;
    private String name;
    private int age;

    Student(int number,String name,int age)
    {
        this.setNumber(number);
        this.setName(name);
        this.setAge(age);
    }
    
    public void setNumber(int number)
    {
        if(number>=1)
        this.number=number;
    }
    public int getNumber()
    {
        return number;
    }
    public void setName(String name)
    {
        this.name=name;
    }
    public String getName()
    {
        return name;
    }
    public void setAge(int age)
    {
        if(age>=0&&age<135)
        this.age=age;
    }
    public int getAge()
    {
        return age;
    }
    
    public String getInfo()
    {
        return "学号："+this.getNumber()+"，姓名："+this.getName()+"，年龄："+this.getAge();
    }
}