模式,Java中的matcher,REGEX帮助

Pattern p = Pattern.compile("(\\w+) \\1");
StringBuilder sb = new StringBuilder(1000);
int i = 0;
for (String s : lineOfWords) { // line of words is a List<String> that has each line read in from txt file
Matcher m = p.matcher(s.toUpperCase());
// and then do something like
while (m.find()) {
  // do something here
}

我试着查看m.end,看看是否可以创建一个新字符串,或者删除匹配项所在的项,但在阅读文档之后,我不确定它是如何工作的。例如,作为一个测试用例来了解它是如何工作的,我做了:

if (m.find()) {
System.out.println(s.substring(i, m.end()));
    }

到包含以下内容的文本文件: This is an example example test test test.

This is ?

如果我有一个AraryList行words,它从一行.txt文件中读取每一行,然后我创建一个新的ArrayList来保存修改后的字符串。例如

List<String> newString = new ArrayList<String>();
for (String s : lineOfWords { 
   s = s.replaceAll( code from Kobi here);
   newString.add(s);
}