反射的使用

Posted 2020-09-06

1.反射获取属性值

        Apple apple = new Apple("香", 34.8f);
        
        Field field = Apple.class.getDeclaredField("price");
        
        Field[] fields = Apple.class.getFields();
        
        for (Field field2 : fields) {
            System.out.println(field2.getName());
        }
        
        System.out.println("-----");
        
        fields = Apple.class.getDeclaredFields();
        for (Field field2 : fields) {
            System.out.println(field2.getName());
        }
        
        System.out.println("-----");
        field.setAccessible(true);
        
        float money = field.getFloat(apple);
        System.out.println(money);

View Code

结果:

color
-----
taste     //私有属性
price     //私有属性
color     //公有属性
size      //包级私有属性
shape     //受保护属性
-----
34.8