如何在java中查找字符串中的全字索引

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了如何在java中查找字符串中的全字索引，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含1727字，纯文字阅读大概需要3分钟。

内容图文

我想找出给定字符串中所有单词的起始索引.
让我们说下面给出了一个字符串.

“an ancient manuscripts, another means to divide sentences into
paragraphs was a line break (newline) followed by an initial at the
beginning of the next paragraph. An initial is an oversize capital
letter, sometimes outdented beyond the margin of text. This style can
be seen, for example, in the original Old English manuscript of
Beowulf. Outdenting is still used in English typography, though not
commonly.[4] Modern English typography usually indicates a new
paragraph by indenting the first line”); “

我想找出“段落”的起始索引.其中不应包括“段落”,“段落”.

谁能想出如何在java中做到这一点.
提前致谢.

解决方法:

您可以使用word boundaries character的正则表达式：

String text = "an ancient manuscripts, another means to divide sentences into paragraphs was a line break (newline) followed by an initial at the beginning of the next paragraph. An initial is an oversize capital letter, sometimes outdented beyond the margin of text. This style can be seen, for example, in the original Old English manuscript of Beowulf. Outdenting is still used in English typography, though not commonly.[4] Modern English typography usually indicates a new paragraph by indenting the first line";

Matcher m = Pattern.compile("\\bparagraph\\b").matcher(text);
while (m.find()) {
    System.out.println("Matching at: " + m.start());
}

如果你不想要“段落”. (“段落”后跟一个点),你可以试试

Matcher m = Pattern.compile("\\bparagraph($| )").matcher(text);

这意味着段落后跟空格或行尾.

如果您要查找的字符串可以包含特殊字符(如“(”),则可以使用Pattern.quote()来转义它：

String mySearchString = "paragraph";
Matcher m = Pattern.compile("\\b" + Pattern.quote(mySearchString) + "($| )").matcher(text);

内容总结

以上是互联网集市为您收集整理的如何在java中查找字符串中的全字索引全部内容，希望文章能够帮你解决如何在java中查找字符串中的全字索引所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端