反射，泛型擦除

package demo02;

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

public class demo04 {
    //ArrayList<String> list 添加int类型数据
    public static void main(String[] args) throws Exception {
        //泛型擦除(字节码文件中没有泛型)
        ArrayList<String> arr  =new ArrayList<String>();
        arr.add("abc");
        Class c =arr.getClass();
        Method addd =c.getMethod("add", Object.class);
        addd.invoke(arr, 1);
        System.out.println(arr);
        for(Object obj:arr){
            System.out.println(obj);
        }       
    }
}