import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^\\d{1,2}([ -.\\/])(\\d{1,2}|[a-zA-z]{3,15})(?1)\\d{2,4}( \\d{2}:\\d{2}(:\\d{2}([.:]\\d)?)?)?$|^(\\d{1,2}|[a-zA-z]{3,15})([ -.\\/])\\d{1,2}(?7)\\d{2,4}( \\d{2}:\\d{2}(:\\d{2}([.:]\\d)?)?)?$|^\\d{2,4}([ -.\\/])(\\d{1,2}|[a-zA-z]{3,15})\\d{1,2}(?11)( \\d{2}:\\d{2}(:\\d{2}([.:]\\d)?)?)?$";
final String string = "23/02/1993\n"
+ "23-02/1993\n"
+ "23-fev-1993\n"
+ "fev-23-1993\n"
+ "fev.02.93\n"
+ "28-OCT-90\n"
+ "28-OCT-1990\n"
+ "10/28/90\n"
+ "10/28/1990\n"
+ "28.10.90\n"
+ "dd.mm.yyyy\n"
+ "28.10.1990\n"
+ "90/10/28\n"
+ "yyyy/mm/dd\n"
+ "1990/10/28\n"
+ "4 Q 1990\n"
+ "OCT 90\n"
+ "OCT 1990\n"
+ "01:02\n"
+ "01:02:34.75\n"
+ "02:34\n"
+ "02:34.75\n"
+ "20 08:03\n"
+ "20 08:03:00\n"
+ "20-JUN-1990 08:03\n"
+ "20-JUN-1990 08:03:00\n"
+ "1990-06-20 08:03\n"
+ "1990-06-20 08:03:00.0";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html