if an occurrence if a pattern was found in a given string. create matcher for pattern p and given string Private static final Pattern p = pile("*++(+)") If you want to extract only certain numbers from a string you can provide an index to the group() function.įor example, if we wanted to only extract the second set of digits from the string string1234more567string890, i.e. Matcher m = p.matcher("string1234more567string890") Extract All Numbers from a String import The following Java Regular Expression examples focus on extracting numbers or digits from a String. This is particularly useful when testing APIs and you need to parse a JSON or XML response. The following are examples which show how to extract numbers from a string using regular expressions in Java.īeing able to parse strings and extract information from it is a key skill that every tester should have.
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