java----反射

Posted 2021-02-17 小名的同学

获取Class对象的三种方法

package com.first;
public class Demo {
    public static void main(String[] args) {
        Dog dog = new Dog("花花",10);
        //方式一，通过对象获取class对象
        Class<? extends Dog> aClass = dog.getClass();

        //方式二，通过类来获取
        Class<Dog> dogClass = Dog.class;

        //方式三，通过Class.forName;
        try {
            Class.forName("com.first.Dog");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }


    }
}
class Dog{
    private String name;
    private int age;
    public Dog(String name, int age) {
        this.name = name;
        this.age = age;
    }
}