package com;

import java.lang.reflect.Constructor;

public class Person {

    public Person() {

    }

    public Person(String name){

        this.name=name;

    }

    public Person(int age){

        this.age=age;

    }

    public Person(String name, int age) {

        this.age=age;

        this.name=name;

    }

     public String getName() {

            return name;

        }

        public void setName(String name) {

            this.name = name;

        }

        public int getAge() {

            return age;

        }

        public void setAge(int age) {

            this.age = age;

        }

        @Override

        public String toString(){

            return "["+this.name+"  "+this.age+"]";

        }

        private String name;

        private int age;

    }

    class hello{

        public static void main(String[] args) throws Exception{

            Class<?> demo=null;

            try {

                demo=Class.forName("com.Person");

            } catch (ClassNotFoundException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

            Person per1=null;

            Person per2=null;

            Person per3=null;

            Person per4=null;

            Constructor<?> cons[]=demo.getConstructors();

            per1=(Person)cons[0].newInstance();

            per2=(Person)cons[1].newInstance("as");

            per3=(Person)cons[2].newInstance(20);

            per4=(Person)cons[3].newInstance("as",20);

            System.out.println(per1);

            System.out.println(per2);

            System.out.println(per3);

            System.out.println(per4);

        }

        public static void asdsa(){

              Class<?> demo=null;

                try{

                    demo=Class.forName("com.Person");

                }catch (Exception e) {

                    e.printStackTrace();

                }

                Person per=null;

                try {

                    per=(Person)demo.newInstance();

                } catch (InstantiationException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                } catch (IllegalAccessException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

                per.setName("Rollen");

                per.setAge(20);

                System.out.println(per);

        }

}