反射2

package cn.itcast.reflect;

import java.lang.reflect.Field;

import org.junit.Test;

public class Demo4 {

/**反射类的字段
* @param args
* @throws Exception 
*/

//反射：public String name; 
@Test
public void test1() throws Exception{

Person p = new Person();

Class clazz = Class.forName("cn.itcast.reflect.Person");

Field f = clazz.getField("name");  //name

f.set(p, "flx");

System.out.println(p.getName());

}

//反射：public String name; 
@Test
public void test2() throws Exception{

Person p = new Person();
p.setName("xxx");

Class clazz = Class.forName("cn.itcast.reflect.Person");
Field f = clazz.getField("name");  //name
String result = (String) f.get(p);
System.out.println(result);

}

//反射：public final String password = "";  //字段或成员变量
@Test
public void test3() throws Exception{

Person p = new Person();

Class clazz = Class.forName("cn.itcast.reflect.Person");
Field f = clazz.getField("password");  //name
String result = (String)f.get(p);
System.out.println(result);

}

//反射：private int age; 私有字段
@Test
public void test4() throws Exception{

Person p = new Person();

Class clazz = Class.forName("cn.itcast.reflect.Person");
Field f = clazz.getDeclaredField("age");
f.setAccessible(true);

f.set(p, 123);

int result = (Integer) f.get(p);
System.out.println(result);

}

}