How to Extract Substrings Enclosed in Single Quotes Using Regex?

Extracting Substrings with Regex: Single Quote Delimiters

Question:
How do you extract a substring that's enclosed by single quotes using regular expressions?

Answer:

Step 1: Identify the Pattern
The pattern you're looking for in the provided text is:

'(.*?)'

This pattern includes:

• ' (the opening single quote)
• (.*?) (the data you want, captured in the group)
• ' (the closing single quote)

The (.*?) part is a non-greedy capture group that matches any number of characters except single quotes.

Step 2: Create the Matcher

Use the compile and matcher methods to create a Matcher object:

Pattern pattern = Pattern.compile("'(.*?)'");
Matcher matcher = pattern.matcher(mydata);

Step 3: Find and Print the Substring

Use the find and group methods to find the substring and print it:

if (matcher.find())
{
    System.out.println(matcher.group(1));
}

Example:

Here's an example with the provided text:

String mydata = "some string with 'the data i want' inside";
// Rest of the code is the same as above

Output:

the data i want

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