two num

两个数相加，如果是Integer的情况，用一个方法处理该如何操作呢？

The issue only asks, in Chinese, how to add two numbers when they are Integer values; it names no file, test, or entry point. First inspect the repository's Java solution structure and clarify the expected method and behavior. The work is done when the intended operation and its acceptance test are agreed and implemented.

索引モデルが issue の本文から書いたものです。