Java学习笔记--反射

package com.evor.test;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

public class Test1{
	public static void main(String args[]){
		Class<?> demo1 = null; 	//类类型
		Class<?> demo2=null;
		Class<?> demo3=null;
		try{
			demo1=Class.forName("com.evor.test.Person");	//获得类类型
		}catch(Exception e){
			
		}
		demo2 = new Person().getClass(); //另一种获得类类型的方式
		demo3 = Person.class;			 //另一种获得类类型的方式
		
		System.out.println("类名称"+demo1.getName());
		System.out.println("类名称"+demo2.getName());
		System.out.println("类名称"+demo3.getName());
		
		try {
			Constructor<?> c1 =demo1.getDeclaredConstructor();
			System.out.println(c1);	//构造器名
			Constructor<?> con = demo2.getDeclaredConstructor(new Class[]{String.class,String.class,String.class,int.class});
			System.out.println(con);
			try {
				Object obj1 = c1.newInstance(new Object[]{}); //创建一个实例
				Object obj2 = con.newInstance(new Object[]{"20000001","李明","男",19}); //创建一个实例
				System.out.println(obj1);
				System.out.println(obj2);
				
				demo1.getMethod("getInfo", null);

			} catch (Exception e) {
				e.printStackTrace();
			} 
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	
}

class Person{
	private String sno ;
	private String sname ;
	private String sex ;
	private int age;
	public Person(String sno, String sname , String sex , int age){
		this.sno = sno;
		this.sname = sname;
		this.sex = sex;
		this.age = age;
	}
	public Person(){
		this.sno = "unknow";
		this.sname = "unknow";
		this.sex = "unknow";
		this.age = 0;
	}
	
	public void setSno(String sno){
		this.sno = sno;
	}
	
	public void setSname(String sname){
		this.sname = sname; 
	}
	
	public void setSex(String sex){
		this.sex = sex;
	}
	
	public void setAge(int age){
		this.age = age;
	}
	
	public String getSno() {
		return sno;
	}
	public String getSname() {
		return sname;
	}
	public String getSex() {
		return sex;
	}
	public int getAge() {
		return age;
	}
	
	public String getInfo(){
		return "学号："+sno+"，姓名："+sname+"，性别："+sex+"，年龄:"+String.valueOf(age);
	}
	
	
}