The constructor of a reflection class __ function

Person.java

Package com.feng.reflect;

Import java.util.List;

public class Person {public
	String name= "AAA";
	Public person () {
		System.out.println (' person ');
	}
	
	Public person (String name) {
		System.out.println (name);
	}
	
	Public person (String name,int password) {
		System.out.println (name+ ":" +password);
	}
	
	Private person (List list) {
		System.out.println ("list");
	}

Demo.java

Package com.feng.reflect;
Import java.awt.List;
Import Java.lang.reflect.Constructor;
Import java.lang.reflect.InvocationTargetException;

Import java.util.ArrayList;

Import Org.junit.Test; The constructor of the reflection class, which creates the object of the class public class Demo2 {//Reflection class constructor: Public person () @Test public void Test1 () throws Classnotfoundexcep tion, nosuchmethodexception, SecurityException, Instantiationexception, Illegalaccessexception,
		IllegalArgumentException, invocationtargetexception{Class clazz = Class.forName ("Com.feng.reflect.Person");
		
		Constructor C = clazz.getconstructor (null);
		person who = (person) c.newinstance (null);
	System.out.println (Person.name); }//Reflection class constructor: Public person (String name) @Test public void Test2 () throws exception{class Clazz = Class.forName ("com.
		Feng.reflect.Person ");
		Constructor C = Clazz.getconstructor (String.class);
		Person P = (person) c.newinstance ("xxx");
	System.out.println (P.name); }//Reflection class constructor: Public person (String name,int password) @Test public voiD test3 () throws exception{Class clazz = Class.forName ("Com.feng.reflect.Person");
		Constructor C = Clazz.getconstructor (String.class,int.class);
		Person P = (person) c.newinstance ("xxx", 12);
	System.out.println (P.name); //private person (list list) @Test public void Test4 () throws exception{Class clazz = Class.forName ("Com.feng.refl Ect.
		Person ");
		Constructor C = Clazz.getdeclaredconstructor (List.class);
		C.setaccessible (TRUE);//violent reflection,,,, need attention.
		Person P = (person) c.newinstance (new ArrayList ());
	System.out.println (P.name); Another way to create an object @Test public void Test5 () throws exception{Class clazz = Class.forName ("Com.feng.reflect.Person")
		;
		Person P = (person) clazz.newinstance ()//In fact, the principle is to reflect the class's parameterless constructor to construct,//This is why when you create a parameter constructor, be sure to create a parameterless constructor
	System.out.println (P.name);
 }
	
}