获得类的信息

获得类的信息

package other;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

//获得类的信息
public class Test04 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, NoSuchMethodException {
        Class c1 = Class.forName("other.User");

//        User user = new User();
//        c1 = user.getClass();

        //获得类的名字
        System.out.println(c1.getName());//获得包名+类名
        System.out.println(c1.getSimpleName());//获得类名

        //获得类的属性
        System.out.println("========");
        Field[] fields = c1.getFields();    //只能找到public属性

        fields = c1.getDeclaredFields();//找到全部属性
        for (Field field : fields) {
            System.out.println(field);
        }

        //获得指定属性的值
        Field name = c1.getDeclaredField("name");
        System.out.println(name);

        //获得类的方法
        System.out.println("==========");
        Method[] methods = c1.getMethods();//获得本类及其父类的全部public方法
        for (Method method : methods) {
            System.out.println("正常的:"+method);
        }
        methods = c1.getDeclaredMethods();//获得本类的全部方法
        for (Method method : methods) {
            System.out.println("getDeclaredMethods:"+method);
        }

        //获得指定方法
        Method getName = c1.getMethod("getName", null);
        Method setName = c1.getMethod("setName", String.class);
        System.out.println(getName);
        System.out.println(setName);
    }
}