formvalidation.java

public static class PasswordChange {
        @MinLength(5)
        @Required
        public String password;

        @MinLength(5)
        @Required
        public String repeatPassword;

        public String getPassword() {
            return password;
        }

        public void setPassword(String password) {
            this.password = password;
        }

        public String getRepeatPassword() {
            return repeatPassword;
        }

        public void setRepeatPassword(String repeatPassword) {
            this.repeatPassword = repeatPassword;
        }

        public String validate() {
            if (password == null || !password.equals(repeatPassword)) {
                return Messages.get("auth.change_password.error.passwords_not_same");
            }
            return null;
        }
    }