在Java中如何将String转换为char或char转换为String？ [英] In Java how does one turn a String into a char or a char into a String?
问题描述
是否有办法将 char 变成 String 或 String 用一个字母变成 char （就像你可以将 int 变成 double 和 double 转换为 int ）？ （如果可以，请链接到相关文档）。
Is there a way to turn a char into a String or a String with one letter into a char (like how you can turn an int into a double and a double into an int)? (please link to the relevant documentation if you can).
我如何找到这样的东西，我只是在文档中清楚地知道？
How do I go about finding something like this that I'm only vaguely aware of in the documentation?
推荐答案
char firstLetter = someString.charAt(0);
String oneLetter = String.valueOf(someChar);
您可以通过识别可能涉及的类来找到文档。这里，候选人 java.lang.String 和 java.lang.Character 。
You find the documentation by identifying the classes likely to be involved. Here, candidates are java.lang.String and java.lang.Character.
您应该首先熟悉：
-
java.lang -
java.util中的Java Collection框架
- Primitive wrappers in
java.lang - Java Collection framework in
java.util
它还有助于通过教程更慢地介绍API。
It also helps to get introduced to the API more slowly through tutorials.
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