在泛型为Integer的ArrayList中存放一个String类型的对象

通过反射获取list集合的所有方法，然后把字符串存入集合中。

import java.lang.reflect.InvocationTargetException;

public class reflectDemo {

    public static void main(String[] args) throws NoSuchMethodException,
            NoSuchMethodException, InvocationTargetException,
            InvocationTargetException, IllegalAccessException {

        ArrayList list = new ArrayList();

        for (int i = 0; i < 6; i++) {
            list.add(i);
        }

        String str = "我是字符串";
        Method method = list.getClass().getMethod("add", Object.class);
        method.invoke(list, str);

        Iterator iterator = list.iterator();
        while (iterator.hasNext()) {
            System.out.print(iterator.next()+" ");
        }

    }

}

输出结果：

0 1 2 3 4 5 我是字符串