The getInstance() method first tests to determine if the type under consideration is supported by reflecting an appropriate method: getInt() for an int, getString() for a String, and so on.

getInstance() 方法首先通过反射一个适当的方法以测试判断当前考虑的类型是否受支持：getInt() 对应于 int，getString() 对应于 String，等等。

youdao

So when you have a function called GetString, -- that means it's going to get a string from the user -- -- prompt the user for a string -- whereas printf is literally going to print it, not to paper, but to the screen.

所以当你有一个叫做GetSting的函数，它的意思是从用户那获得一个字符串-,提示用户输入一个字符串-,然而printf的确是用来打印的，不是在纸上，而是在屏幕上。

哈佛公开课 - 计算机科学课程节选

So long as I say I'm gonna put a string here, it doesn't matter what string it is, GetString is gonna take care of the job of getting it from the user.

把变量放在这，我们先不要管这个string是什么，GetString会负责,从用户那里获取该值。

哈佛公开课 - 计算机科学课程节选

You've used get int, get string, or the like perhaps already.

你们用过GetInt，GetString，或者其他的。

哈佛公开课 - 计算机科学课程节选