import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "\\b([A-Z]{2})[^A-Z0-9]*?([0-9]{1,2})[^A-Z0-9]*?([A-Z]{0,3})[^A-Z0-9]*?([0-9]{4})\\b";
final String string = "MP13QH3998\n"
+ "MP-13-QH-3998\n"
+ "MP 13 QH 3998\n"
+ "RJ 03QH3918\n"
+ "RJ 03QH3918\n"
+ "MP,,,03-QH3998\n"
+ "MP03QH3998\n\n"
+ "invalid inputs:\n"
+ "MP,,01,03-QH3998\n"
+ "MP0203QH3998\n"
+ "MP03QJJH3998\n"
+ "MP03QH399998";
final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
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