在 Java 中迭代 StringBuilder 的标准方法？
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Standard way to iterate over a StringBuilder in Java?
提问by jmite
I was quite surprised that I couldn't find an existing questions answering this.
我很惊讶我找不到回答这个问题的现有问题。
What is the standard way to iterate over all characters in a StringBuilder in Java?
在 Java 中迭代 StringBuilder 中所有字符的标准方法是什么？
The obvious route is to just convert it to a String then use toCharArray(). The problem is, I'm dealing with thousands of unique strings, with which I do a lot of appending, and I think I'm getting memory and performance issues from having to intern them all.
显而易见的方法是将其转换为字符串，然后使用 toCharArray()。问题是，我正在处理数以千计的唯一字符串，我对这些字符串进行了很多附加操作，而且我认为我不得不将它们全部实习，从而导致内存和性能问题。
EDIT: to clarify, I'm not manually interning Strings, but my understanding was that they were automatically interned, and that if I called toStringfor a StringBuilder that they would be interned. Perhaps I have misunderstood.
编辑：澄清一下，我不是手动实习字符串，但我的理解是它们是自动实习的，如果我调用toStringStringBuilder，它们将被实习。可能我理解错了。
采纳答案by chrylis -cautiouslyoptimistic-
First off, if you're interning lots of strings, you're doing something very wrong.
首先，如果你要实习很多字符串，那你就做错了。
More generally, StringBuilderimplements CharSequence, just like String. Use an ordinary counter-based forloop and charAt().
更一般地说，StringBuilder实现CharSequence，就像String. 使用普通的基于计数器的for循环和charAt().
