封装

package oop.demo4;
​
import oop.demo4.Student;
​
public class Demo4 {
    public static void main(String[] args) {
        Student student=new Student();
        student.getName();
    }
}

package oop.demo4;
​
public class Student {
    private String name;
​
    public String getName() {
        return name;
    }
​
    public void setName(String name) {
        this.name = name;
    }
}