事先在Fanshe包下建立一个Student的类


package Fanshe;
//需求 实现Student s=new Studemt("李清霞",20);
//System.out.println(s)

import java.lang.reflect.Constructor;

public class Fanshedeom1 {
    public static void main(String[] args) throws Exception {
        //获取class对象
        Class<?> clss = Class.forName("Fanshe.Student");
        //获取构造方法
        Constructor<?> stu = clss.getConstructor(String.class,int.class);
        //新建对象
        Object o = stu.newInstance("李清霞",20);
        System.out.println(o);
    }
}