Generally speaking about regexes, you definitely should begin your journey into Regex wonderland here: Regex tutorial

What you currently need is the | (pipe character)

To match the strings one OR other, use:

(one|other)

or if you don’t want to store the matches, just simply

one|other

To be Java specific, this article is very good at explaining the subject

You will have to use your patterns this way:

//Pattern and Matcher
Pattern compiledPattern = Pattern.compile(myPatternString);
Matcher matcher = pattern.matcher(myStringToMatch);
boolean isNextMatch = matcher.find(); //find next match, it exists, 
if(isNextMatch) {
    String matchedString = myStrin.substring(matcher.start(),matcher.end());
}

Please note, there are much more possibilities regarding Matcher then what I displayed here…

//String functions
boolean didItMatch = myString.matches(myPatternString); //same as Pattern.matches();
String allReplacedString = myString.replaceAll(myPatternString, replacement)
String firstReplacedString = myString.replaceFirst(myPatternString, replacement)
String[] splitParts = myString.split(myPatternString, howManyPartsAtMost);

Also, I’d highly recommend using online regex checkers such as Regexplanet (Java) or regex101, they make your life a lot easier!

The “or” operator is spelled |, for example one|other.

All the operators are listed in the documentation.

You can separate with a pipe thus:

Pattern.compile("regexp1|regexp2");

See here for a couple of simple examples.

Use the | character for OR

Pattern pat = Pattern.compile("exp1|exp2");
Matcher mat = pat.matcher("Input_data");

The answers are already given, use the pipe ‘|’ operator. In addition to that, it might be useful to test your regexp in a regexp tester without having to run your application, for example:

http://www.regexplanet.com/advanced/java/index.html