反射类的字段

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 }