反射类的字段

package reflet;

import java.util.List;
public class person
{
   public String name="aaaaa";
   private int password=123;
   private static int age=456;
}

package reflet;

import java.lang.reflect.Field;

import org.junit.Test;


public class demo4 {
    //反射字段: public String name="aaaaa";
    @Test
    public void test1() throws Exception
    {
        person p=new person();
        Class clazz=Class.forName("reflet.person");
        Field f=clazz.getField("name");
        String name=(String)f.get(p);//获取字段的值
        Class type=f.getType();//获取字段的的类型
        System.out.println(name);//打印字段的值
        System.out.println(type);//打印字段的类型
        
        //设置字段的值
        f.set(p, "nihao");
        System.out.println(p.name);
        
    }
    //反射字段: public String name="aaaaa";的另一种写法
    @Test
    public void test11() throws Exception
    {
        person p=new person();
        Class clazz=Class.forName("reflet.person");
        Field f=clazz.getField("name");
    
    
        System.out.println(f.get(p));//打印字段的值
        
        
    }
//反射字段:private int password=123;
            @Test
            public void test2() throws Exception
            {
                person p=new person();
                Class clazz=Class.forName("reflet.person");
                Field f=clazz.getDeclaredField("password");
                f.setAccessible(true);
                int name=(int)f.get(p);//获取字段的值
                Class type=f.getType();//获取字段的的类型
                System.out.println(name);//打印字段的值
                System.out.println(type);//打印字段的类型    
            }
//反射字段: private static int age=456;
            @Test
            public void test3() throws Exception
            {
                person p=new person();
                Class clazz=Class.forName("reflet.person");
                Field f=clazz.getDeclaredField("age");
                f.setAccessible(true);
                int name=(int)f.get(p);//获取字段的值
                Class type=f.getType();//获取字段的的类型
                System.out.println(name);//打印字段的值
                System.out.println(type);//打印字段的类型    
            }
            
}