1 package reflet;
2
3 import java.util.List;
4 public class person
5 {
6 public String name="aaaaa";
7 private int password=123;
8 private static int age=456;
9 }
1 package reflet;
2
3 import java.lang.reflect.Field;
4
5 import org.junit.Test;
6
7
8 public class demo4 {
9 //反射字段: public String name="aaaaa";
10 @Test
11 public void test1() throws Exception
12 {
13 person p=new person();
14 Class clazz=Class.forName("reflet.person");
15 Field f=clazz.getField("name");
16 String name=(String)f.get(p);//获取字段的值
17 Class type=f.getType();//获取字段的的类型
18 System.out.println(name);//打印字段的值
19 System.out.println(type);//打印字段的类型
20
21 //设置字段的值
22 f.set(p, "nihao");
23 System.out.println(p.name);
24
25 }
26 //反射字段: public String name="aaaaa";的另一种写法
27 @Test
28 public void test11() throws Exception
29 {
30 person p=new person();
31 Class clazz=Class.forName("reflet.person");
32 Field f=clazz.getField("name");
33
34
35 System.out.println(f.get(p));//打印字段的值
36
37
38 }
39 //反射字段:private int password=123;
40 @Test
41 public void test2() throws Exception
42 {
43 person p=new person();
44 Class clazz=Class.forName("reflet.person");
45 Field f=clazz.getDeclaredField("password");
46 f.setAccessible(true);
47 int name=(int)f.get(p);//获取字段的值
48 Class type=f.getType();//获取字段的的类型
49 System.out.println(name);//打印字段的值
50 System.out.println(type);//打印字段的类型
51 }
52 //反射字段: private static int age=456;
53 @Test
54 public void test3() throws Exception
55 {
56 person p=new person();
57 Class clazz=Class.forName("reflet.person");
58 Field f=clazz.getDeclaredField("age");
59 f.setAccessible(true);
60 int name=(int)f.get(p);//获取字段的值
61 Class type=f.getType();//获取字段的的类型
62 System.out.println(name);//打印字段的值
63 System.out.println(type);//打印字段的类型
64 }
65
66 }
