package lianxi1;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import org.junit.Test;public class TestReflection2 {    @Test    public void test1() throws ClassNotFoundException, SecurityException, NoSuchFieldException, InstantiationException, IllegalAccessException {        //1.获取运行类的属性        String str = "lianxi1.Person";        Class clazz = Class.forName(str);        Field f1 = clazz.getField("name");        //如果属性是private的        Field f2 = clazz.getDeclaredField("age");        f2.setAccessible(true);       //2.创建运行类的对象        Object obj = clazz.newInstance();        Person p = (Person)obj;        System.out.println(p);       //3.对属性赋值        f1.set(p, "tian");        f2.set(p, 25);        System.out.println(p);    }    @Test    public void test2() throws ClassNotFoundException, SecurityException, NoSuchMethodException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException{        //2.调用运行时类中指定的方法        Class clazz = Person.class;        Method m1 = clazz.getMethod("show");        Person p1 = (Person)clazz.newInstance();        Object obj = m1.invoke(p1);   //如果是静态方法改为 m1.invoke(Person.class)        System.out.println(obj);                Method m2 = clazz.getDeclaredMethod("display",String.class,int.class);        m2.setAccessible(true);        Object obj2 = m2.invoke(p1,"yu",22);        System.out.println(obj2);    }    @Test    public void test3() throws SecurityException, NoSuchMethodException, IllegalArgumentException, InstantiationException, IllegalAccessException, InvocationTargetException{        //3.调用制定的构造器，创建运行时类的对象        Class clazz = Person.class;        Constructor con = clazz.getDeclaredConstructor(String.class,int.class);        con.setAccessible(true);        Person p2 = (Person)con.newInstance("wuming",21);        System.out.println(p2);            }}