Regex Tester for Java
Free online regex tester with Java code examples
Working with regex tester in Java? Our free online regex tester helps Java developers format, validate, and process data instantly. Below you will find Java code examples using java.util.regex (built-in) so you can achieve the same result programmatically in your own projects.
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Open Regex TesterJava Code Example
import java.util.regex.*;
String text = "Contact support@example.com";
Pattern pattern = Pattern.compile("[\\w.+-]+@[\\w-]+\\.[\\w.]+");
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
System.out.println(matcher.group());
}Quick Setup
Library: java.util.regex (built-in)
// Built-in package — no installation neededJava Tips & Best Practices
- Compile patterns once and reuse the Pattern object
- Use double backslashes in Java string literals
- Pattern.CASE_INSENSITIVE for case-insensitive matching