反射构造方法.doc

package enums;import java.lang.reflect.Constructor;import java.lang.reflect.InvocationTargetException;import java.util.ArrayList;import java.util.List;import org.junit.Test;public class Refance2 Testpublic void test1() throws ExceptionClass clazz=Class.forName(enums.Person);Constructor c=clazz.getConstructor(null); Person p=(Person) c.newInstance(null); System.out.println();Testpublic void test2() throws ExceptionClass clazz=Class.forName(enums.Person);Constructor c=clazz.getConstructor(String.class);Person p=(Person) c.newInstance(王亚楠);System.out.println();Testpublic void test3() throws ExceptionClass clazz=Class.forName(enums.Person);Constructor v=clazz.getConstructor(String.class,int.class);Person p=(Person) v.newInstance(王亚楠,123);System.out.println();Testpublic void test4() throws ExceptionClass clazz=Class.forName(enums.Person);Constructor c=clazz.getDeclaredConstructor(List.class);c.setAccessible(true);/暴力反射Person p=(Person) c.newInstance(new ArrayList();System.out.println(+4);Test/创建对象的另外一种途径public void test5() throws ExceptionClass clazz=Class.forName(enums.Person);Person p=(Person) clazz.newInstance();System.out.println();class Personpublic String name=王亚楠; public Person() System.out.println(person);public Person(String name)System.out.println(name+name);public Person(String name,int password)System.out.prin