Can Java String.indexOf() handle a regular expression as a parameter?

Question

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?

eg:

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

Answer 1

No.

Check source code for verification

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

Update:

    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(); }