正则表达全字 [英] Regex whole word

问题描述

我觉得这个问题有点傻，但是从我读过的所有内容来看，这应该有效，对我来说不行。我只是想用正则表达式匹配字符串中的整个单词。

I feel a little silly asking this question, but from everything I've read, this should work and it doesn't, for me. I'm just trying to match a whole word in a string using regular expressions.

所以，如果我试图在一个句子中找到the这个词，它应该返回true，因为快速的棕色狐狸跳过懒狗，但是因为快速的棕色狐狸跳过懒狗而返回false。

So, if I'm trying to find the word "the" in a sentence, it should return true for "the quick brown fox jumps over the lazy dog", but return false for "there quick brown fox jumps over the lazy dog".

我试过这个：

 String text = "the quick brown fox jumps over the lazy dog";
 return text.matches("\\bthe\\b");

我也试过：

    String text = "the quick brown fox jumps over the lazy dog";
    String regex = "\\bthe\\b";
    Pattern pattern = Pattern.compile(regex);
    Matcher matcher = pattern.matcher(text);

    return matcher.matches();

我也试过这个正则表达式：\ bthe \b

I've also tried this regex: "\bthe\b"

他们总是返回假。我觉得我在这里遗漏了一些非常明显的东西，因为这不应该太难。 ：）

And they always return false. I feel like I'm missing something pretty obvious here, since this shouldn't be too difficult. :)

推荐答案

你需要的是matcher.find（）

What you need is matcher.find()

http： //download.oracle.com/javase/1.5.0/docs/api/java/util/regex/Matcher.html#find%28%29

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