获取反射类型的四种方式.1.Class.forName()；2.Person.class；3.person.getClass()；4.classLoader.loadClass()

package com.hrf.reflect02;

public class ReflectTest {

	public static void main(String[] args) throws Exception {
//		动态创建对象的过程就叫反射.
		way01();
		way02();
		way03();
		way04();
	}
	
//	构造反射的三种方式
//	1.
	public static void way01() throws Exception {
//		获取反射的类型
		Class<?> c = Class.forName("com.hrf.reflect02.Person");
//		创建对象
		Person person = (Person) c.newInstance();
		System.out.println(person.getUsername());
	}
//	2.
	public static void way02() throws Exception {
//		获取反射的类型
		Class<?> c = Person.class;
//		创建对象
		Person person = (Person) c.newInstance();
		System.out.println(person.getUsername());
	}
//	3.
	public static void way03() throws Exception {
//		通过对象方式获取反射的类型
		Person person = new Person();
		Class<? extends Person> c = person.getClass();
		System.out.println(c);
	}
//	4.
	public static void way04() throws Exception {
//		通过类加载器
		ClassLoader classLoader = new ClassLoader() {
		};
		
//		获取反射的类型
		Class<?> loadClass = classLoader.loadClass("com.hrf.reflect02.Person");
//		创建对象newInstance()创建实例.
		Person person = (Person) loadClass.newInstance();
		System.out.println(person.getUsername());
	}
	
}


class Person{
	private String username = "张三";

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}
	
}