password policy with regular expression

Password policy to match minimum 8 characters password with alphabets in combination with numbers or special characters

package regexp;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

 * Helper for password policy
 * @author ntallapa
public class PwdPolicyVerifier {

	private Pattern pattern;
	private Matcher matcher;

	 * password policy to match 8 characters with alphabets in combination with numbers or special characters
	 * (?=.*[a-zA-Z]) means one or more alphabets, it can be small or CAPS
	 * (?=.*[0-9@#$%]) means one or more numerals or special characters
	 * {8,} means password length should be minimum 8
	private String pwd_policy = "((?=.*[a-zA-Z])(?=.*[0-9@#$%]).{8,})";

	public PwdPolicyVerifier() {
		pattern = Pattern.compile(pwd_policy);

	 * Verify the validity of the given client password
	 * @param password
	 * @return boolean if test string passed the password policy or not
	public boolean verify(String password) {
		matcher = pattern.matcher(password);
		if (matcher.matches()) {
			System.out.println(password + " matched the regexp");
		} else {
			System.out.println(password + " didnt match the regexp");
		return matcher.matches();


	// some test cases
	public static void main(String[] args) {
		PwdPolicyVerifier pv = new PwdPolicyVerifier();


welcome1 matched the regexp
welcomeA didnt match the regexp
Welcome@ matched the regexp
12341234 didnt match the regexp
####$$$$ didnt match the regexp
Welcome@12 matched the regexp
WELCOME12 matched the regexp


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