问题描述
我有一个这样的数组列表： ArrayList names = new ArrayList<>（）; ，用于存储人们在不同教科书中输入的名字和姓氏。
I have an array list like this: ArrayList names = new ArrayList<>(); that stores people's first and last names when they are entered in different textbooks.
因此，当提示乔·拜登的提示是元素编号1时，巴拉克·奥巴马（Barack Obama）将是数组列表中的元素编号2。我的问题是，是否有可能仅从阵列中获得像Joe这样的名字而又没有得到Biden？
So when prompted to Joe Biden would be element number 1 then Barack Obama would be element number 2 in the array list. My question is that if it is possible to only get their first names like Joe from the array without getting Biden also?
推荐答案
是的，您可以做
names.get(0).split("\\s+")[0] //this would get you "Joe"
可能会得到姓氏
names.get(0).split("\\s+")[1] //this would get you "Biden"
这种方式完全取决于您的名字和姓氏之间有一个空格。并显然将 0 编辑为所需的任何索引。
This way completely relies on the fact that you have a space in between their first and last name. and obviously edit the 0 to whatever index you would like.
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