//class反射编程
//定义一个学生类
public class test124 {public String name;protected int age;double height;private double money;public void setName(String name) {this.name = name;}public String getName() {return name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public test124(String name, Integer age){this.name=name;this.age=age;System.out.println( "调用有参构造方法" );}public test124(String name,int age,double money){this.name=name;this.age=age;this.money=money;}//看书public void learn(BookRead book){System.out.println( "我的名字"+name+ "我正在学习"+book.getName());}//奔跑public void run(){System.out.println( "我们喜欢奔跑" );}
}

定义constructor类

import java.lang.reflect.Constructor;//constructor类反射编程
public class test127{public static void main(String[] args){try {//获取构造器Class<?> stuCla = Class.forName( "test124" );//获取构造器反射相关方法实现对象的创建Constructor cons=stuCla.getConstructor( String.class,Integer.class );test124 stuObj=(test124)cons.newInstance( "歌谣",23 );System.out.println( "我的名字是"+stuObj.getName()+"我的年龄"+stuObj.getAge() );System.out.println( "构造器的访问级别"+cons.getModifiers() );System.out.println( "参数的个数" +cons.getParameterCount());}catch (Exception e){e.printStackTrace();}}
}

运行结果