Java String.indexOf（）可以将正则表达式作为参数处理吗？ [英] Can Java String.indexOf() handle a regular expression as a parameter?

问题描述

我想捕获Java String中特定正则表达式的索引。该字符串可以用单引号或双引号括起来（有时没有引号）。如何使用Java捕获该索引？

I want to capture the index of a particular regular expression in a Java String. That String may be enclosed with single quote or double quotes (sometimes no quotes). How can I capture that index using Java?

例如：

capture String -->  class = ('|"|)word('|"|)

推荐答案

否。

检查源代码以进行验证

WorkAround：
这不是标准做法，但你可以用这个来获得结果。

WorkAround : Its not standard practice but you can get result using this.

更新：

    CharSequence inputStr = "abcabcab283c";
    String patternStr = "[1-9]{3}";
    Pattern pattern = Pattern.compile(patternStr);
    Matcher matcher = pattern.matcher(inputStr);
    if(matcher.find()){

    System.out.println(matcher.start());//this will give you index
    }

OR

Regex r = new Regex("YOURREGEX");

// search for a match within a string
r.search("YOUR STRING YOUR STRING");

if(r.didMatch()){
// Prints "true" -- r.didMatch() is a boolean function
// that tells us whether the last search was successful
// in finding a pattern.
// r.left() returns left String , string before the matched pattern 
int index = r.left().length();
} 

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