获取类的运行时结构

package edu.wtbu;

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

public class Demo01 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchFieldException, NoSuchMethodException {
        Class<?> c1 = Class.forName("edu.wtbu.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
        //Field[] fields1 = c1.getFields();   只能获得public属性
        Field[] fields = c1.getDeclaredFields();//找到全部的属性
        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
        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);
        }

        Method[] method1 = c1.getDeclaredMethods();//获得本类及其父类的全部public方法
        for (Method method : method1) {
            System.out.println("getDeclaredMethods"+method);//获得本类的全部方法
        }

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

        //获得构造器
        Constructor<?>[] constructors = c1.getConstructors();
        for (Constructor<?> constructor : constructors) {
            System.out.println(constructor);
        }

        Constructor<?>[] constructor1 = c1.getDeclaredConstructors();
        for (Constructor<?> constructor : constructor1) {
            System.out.println(constructor);
        }

        //获得指定的构造器
        Constructor<?> declaredConstructor = c1.getDeclaredConstructor(String.class, int.class, int.class);
        System.out.println("指定："+declaredConstructor);

    }
}