【通过反射越过泛型检查】

package com.yjf.esupplier.common.test;

import java.lang.reflect.Method;
import java.util.ArrayList;

/**
 * @author shusheng
 * @description 通过反射越过泛型检查
 * @Email shusheng@yiji.com
 * @date 2019/1/5 18:37
 */
public class ReflectDemo5 {

    public static void main(String[] args) throws Exception {
        // 创建集合对象
        ArrayList<Integer> array= new ArrayList<Integer>();
        Class c = array.getClass();
        Method m1 = c.getMethod("add", int.class, Object.class);
        m1.invoke(array,0,"hello");
        m1.invoke(array,1,"world");
        m1.invoke(array,2,"java");
        System.out.println(array);
        System.out.println("------------------------------");
        Method m2 = c.getMethod("add",Object.class);
        m2.invoke(array,"hello");
        m2.invoke(array,"world");
        m2.invoke(array,"java");
        System.out.println(array);
    }

}

package com.yjf.esupplier.common.test;

/**
 * @author shusheng
 * @description
 * @Email shusheng@yiji.com
 * @date 2018/12/29 13:42
 */
public class Person {

        private String name;
        int age;
        public String address;

        public Person() {
        }

        private Person(String name) {
            this.name = name;
        }

        Person(String name, int age) {
            this.name = name;
            this.age = age;
        }

        public Person(String name, int age, String address) {
            this.name = name;
            this.age = age;
            this.address = address;
        }

        public void show() {
            System.out.println("show方法的输出");
        }

        public void method(String s) {
            System.out.println("method方法的输出： " + s);
        }

        public String getString(String s, int i) {
            return s + "---" + i;
        }

        private void function() {
            System.out.println("function方法的输出");
        }

        @Override
        public String toString() {
            return "Person [name=" + name + ", age=" + age + ", address="
                    + address
                    + "]";
        }

}