How to Extract a Substring Enclosed in Single Quotes Using Regex?

Regex to Extract Substring between Single Quotes

When working with strings, it may be necessary to extract specific substrings based on certain criteria. This question explores how to extract data between single quotes ('') using regular expressions (regex).

The task is to identify the text between single quotes in the following string:

mydata = "some string with 'the data i want' inside";

To accomplish this, we can leverage the power of regex to write a pattern that matches the target substring. The regular expression provided is:

"'(.*?)'"

Explanation of the Regex:

• ^': Matches the opening single quote.
• (.?)': Captures everything between the opening and closing single quotes using a non-greedy quantifier (?).

Implementation:

Once the regex is defined, we can use a Matcher to find and extract the substring:

String mydata = "some string with 'the data i want' inside";
Pattern pattern = Pattern.compile("'(.*?)'");
Matcher matcher = pattern.matcher(mydata);
if (matcher.find()) {
    System.out.println(matcher.group(1));
}

Result:

The output of the above code will be:

the data i want

This demonstrates how to effectively extract a substring between single quotes using regex, providing a method for manipulating and extracting data from strings based on specific patterns.

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