Java tutorial
//package com.java2s; //License from project: Open Source License import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static boolean isPasswordValid(String password) { final String PASSWORD_PATTERN = "(?=.*[0-9])(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%^&+=])(?=\\S+$).{8,}$"; Pattern pattern = Pattern.compile(PASSWORD_PATTERN); Matcher matcher = pattern.matcher(password); return matcher.matches(); } }