import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^(?:(?=.*?[A-Z])(?:(?=.*?[0-9])(?=.*?[-!@#$%^&*()_[\\]\\{\\},.<>+=])|(?=.*?[a-z])(?:(?=.*?[0-9])|(?=.*?[-!@#$%^&*()_[\\]\\{\\},.<>+=])))|(?=.*?[a-z])(?=.*?[0-9])(?=.*?[-!@#$%^&*()_[\\]\\{\\},.<>+=]))[A-Za-z0-9!@#$%^&*()_[\\]\\{\\},.<>+=-]{7,50}$";
final String string = " 1 2 3 4 5 6\n"
+ "12345678901234567890123456789012345678901234567890124567890\n"
+ "aaaaAAAA1111\n"
+ "aaaaBBBBBBB\n"
+ "AAAAaaaa__\n"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa!A\n"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa!\n"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa!A\n"
+ "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa!AA\n\n\n";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.COMMENTS);
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